My Pink Diamonds

The cut of a diamond is the physical measurement and relative proportion of a polished diamond and is the most important characteristic in producing a diamond’s beauty. A single number does not define cut. Instead, it is a myriad of measurements, relative percentages, angles, finish, and performance of light within the diamond.

The brilliance and sparkle of a diamond is the result of the reflection and refraction of light within a diamond and is the cumulative effect of the many facets on the surface of the three-dimensional diamond shape. What makes judging cut difficult is that beauty is in the eye of the beholder. Different people perceive the beauty of a diamond differently in terms of what they perceive as beautiful.

In recent years, major diamond grading laboratories like the Gemological Institute of America (GIA) and the American Gem Society (AGS) have established cut grades to help the consumer make better decisions for purchasing diamonds based on cut characteristics. However, the cut grading systems are different from each other and constantly changing. As a result, there is no single official cut grade but the current systems are a giant leap ahead of the past with no cut grades.

The quality of the cut is most visible in terms of how light performs in a diamond to produce Brightness, Fire, and Scintillation.

Brightness is the visual effect of all the internal and external reflections of white light. This brightness (also known as brilliance) results primarily from the angles of the facets and the relative size of the top facet called the table.

Fire is the visual effect of rainbow colored flashes of light caused by the separation of white light into various colors when the diamond acts as a prism.

Scintillation is the visual effect of sparkle and patterns of light and darkness. Sparkle is the points of light that flash as the diamond, the light source or the observer moves. The arrangement and contrast between the bright and dark areas is important to what the eye perceives as beautiful. An all-bright diamond or an all-dark diamond is less attractive than a diamond with a balanced, symmetrical and contrasting pattern of reflection.

Some of the more important diamond measurements influencing the cut grade are depth percentage, table percentage, crown angle, and pavilion angle. The initial cut grade research focused on round brilliant diamond shapes but the grading laboratories are slowly introducing cut grades for the fancy shapes like the princess, emerald, oval, radiant, cushion and others. Each diamond shape has its own set of cut parameters that produce the optimal light performance and beauty for that particular diamond shape.

If the cut of the diamond is the key to its beauty, why would anyone purchase a diamond without great cut? Probably the main reason is lack of knowledge by the consumer. Until recent years, it has been difficult for the consumer to assess the cut of the diamond because jewelers focused on color, clarity and carat weight. The jeweler used the bright lights in the showroom to mask the light performance of the diamond. As the diamond shopper becomes more aware of what constitutes cut and has access to the GIA or AGS cut grades on the diamond grading reports, they will be able to filter out the average and poor cut diamonds in their purchase decisions.

Sometimes budget is a factor in purchasing something less than the best cut. However, cut is typically a real bargain since there is little visual difference between the top echelons of diamond cut and the price difference between average and exceptional cut is often minimal. Perhaps the real cost of getting better cut in a diamond, is the time and effort to learn about cut and to find a retailer who can provide diamonds with exceptional cut at reasonable prices.

Once a diamond shopper has determined what shape of diamond they want to purchase, they need to research what cut parameters contribute to desirable appearance. Some diamond shoppers fall into a trap of narrowly defining their acceptable range for every diamond measurement, not realizing that the beauty of the diamond results from the interrelationships of all the facets. Simply picking the middle of the range for each parameter can lead to a mediocre result. The cut grades are an attempt to rate how a combination of factors work together in the diamond.

Regardless of the cut grade systems today or in the future, only the diamond shopper can determine what is most appealing to their eye. Cut is critical to the beauty of the diamond so making the best diamond purchase decision means understanding the importance of cut and finding that special diamond that is beautiful to behold.

A certificate is not the same thing as an appraisal.  A certificate describes the quality of a diamond, but it does not place a monetary value on the gem.  An appraisal places a monetary value on your diamond, but does not certify the quality of the diamond.

The Gemological Institute of America (GIA), the American Gem Society (AGS), and the International Gemological Institute (IGI) are the three most widely known and respected diamond grading laboratories in the world.  Each of the grading laboratories have developed a very similar nomenclature for identifying the 4 C’s of diamonds.  The 4 C’s stand for Carat, Color, Clarity, and Cut.  We will also discuss the Shape of diamonds in this article.

Carat Grading

The weight or size of a diamond is measured in carats.  A carat is 0.2 grams or 200 milligrams and is always referenced within 2 decimal points.  This is a highly accurate grading scale used to determine the weight or size of a diamond.

Color Grading

 D to Z 

All diamonds are compared against to an internationally accepted set of master stones and ranges from totally colorless (D) to pale yellow or brown color (Z).  Brown diamonds darker than K color are usually described using their letter grade, and a descriptive phrase, for example M Faint Brown.  Diamonds with more depth of color than Z color fall into the fancy color diamond range.

Color grades D through F are naturally the most valuable and expensive because of their rarity.  Color G through I will show virtually no visible color to the untrained eye.  Selecting the right jewelry to mount the diamond in can minimize color grade J through M.

The coloration of diamonds can be caused by several factors.  Impurities trapped in the diamond during its formation, the crystal lattice structure of the diamond, and the exposure to radiation can all lead to the wide verity of colors available in diamonds.

Clarity Grading

Clarity is determined by the number of blemishes on the surfaces of the diamond and the number of inclusions such as air bubbles, cracks, and foreign material inside of the diamond.  When both terms are being referenced the term defects is usually referenced.  Nature rarely produces anything that is with out defects and this hold true for diamonds.  Most diamonds will have some type of defect or flaw.

When grading the Clarity of a diamond it is necessary to observe the number and the nature of any internal defects in the stone.  The size and position of the defects are also taken into account.  A diamond is said to be Internally Flawless (I.F) when it presents no internal defects under 10x magnification by an experienced eye of laboratory gemologists.

A diamond is said to be Very Very Slightly included (V.V.S.1 to V.V.S.2) when it presents defects that are very difficult to locate under 10x magnification. A diamond is said to be Very Slightly Included (V.S.1 to V.S.2) when it presents defects that are difficult to locate under 10x magnification.

A diamond is said to be Slightly Included (S.I.1 to S.I.2) when it presents defects that are easy to locate under 10x magnification.

A diamond is said to be Imperfect (P.1 to I.1) when it presents defects that are hard to locate with the naked eye.

A diamond is said to be Imperfect (P.2 to I.2) when it presents defects that are easy to locate with the naked eye.

A diamond is said to be Imperfect (P.3 to I.3) when it presents defects that are very easy to locate with the naked eye.

Cut Grading

The symmetry and proportions of a diamond cut determine the life, brilliance and light dispersion.  If any of these cutting factors are below standard then the appearance of the diamond will be adversely affected.

The cut of a diamond has nothing to do with the shape of the diamond.  The cut refers to the diamond’s reflective qualities.  A good cut give the diamond it brilliance or the ability to handle light in a pleasing fashion.  The brightness will seem to come from the very heart of a diamond.

When a ray of light touches the surface of a diamond, part of the light is reflected back, this is external reflection.  The rest of the ray penetrates the stone and is then reflected toward the center of the diamond. This is known as refraction.  The ray of light is reflected to the surface, where it is seen as the colors of the spectrum. This is known as dispersion.

If light enters the diamond through to top or table and then leaks out from the sides or bottom instead of reflecting back to the eye, then the diamond will seen to have less brilliance and fire.  A diamonds cut is the most important of the four Cs.  If all of the rest of the grading scale is at the higher end of the spectrum and the cut has been utilized to maximize the size of the diamond then a very poor quality stone rill be the result.  Happily this trend in size instead of quality is no longer prevalent in the diamond market.  Today standard mathematical algorithms are used to determine the best cut for any shape diamond. Shape

The shape of diamond will fall into one of several standard categories but there are many variations on each standard categories.  Basic categories include Round, Emerald, Pear, Heart, Marquise, Oval, and Princess cuts.

 Round 

The standard for the diamond shape and is used in most engagement rings.

 Emerald 

Rectangular or square step cut with diagonally cut corners.  Usually has 2 to 4 rows of parallel facets to the center of the stone.  A very popular style of cut used for Emeralds hence the name.

 Pear 

Pear or teardrop in shape and may or may not have a large flat surface in the center of the stone.  This stone is usually cut to have about 56 to 58 facets.

 Heart 

Heart in shape and if a shield shaped cutlet is present (flat center) then it will usually have 32 crown facets.  If no culet is present then 24 pavilion facets is the norm.

 Marquise 

Oval in shape with curving sides and pointed ends and was developed in France in the mid 1700s.  May have been named after the Marquise de Pompador, who was a mistress of King Louis XV.

 Oval 

Oval in shape and covered with triangular facets.

 Princess 

Very popular square or modified rectangular shape.  There are many variations of crown and pavilion facets cuts on the market.

A certified diamond is a diamond that has been graded, tested and examined by a team of independent fully trained gemologists who then issue a Diamond certificate for that diamond.

A diamond certificate is a blueprint of a loose diamond that has been certified.

A diamond certificate can also be called a diamond grading report or diamond dossier. The diamond certificate documents the diamond’s exact measurements and weight, as well as the details of its cut and quality. It precisely points out all the individual characteristics of the stone, inclusions and any flaws.

When shopping for loose diamonds it is extremely important that you buy a certified diamond. You can compare one certified diamond with a particular weight and quality with other certified diamonds of similar weight and quality to determine which certified loose diamond has the better value.

A diamond certificate allows you to make an informed choice when buying loose diamonds. 

A certified diamond provides consumers with confidence, security and increases comfort levels while making a decision on which loose diamond to purchase. Before purchasing a loose diamond, you should expect to review a copy of its diamond certificate, as this is your only guarantee of the quality and value of that diamond. Certified diamonds help provide consumer confidence.

A diamond certificate documents the characteristics of the diamonds quality; the colour, cut, clarity & carat weight of the diamond are verified by an independent company with no conflict of interest between buyer and seller.

The true test to evaluate a diamond is to view it in person and compare it with other diamonds. Nothing beats seeing a diamond in person to determine whether it is a ‘good’ diamond to your eye or not. Diamond appreciation is a very personal thing and different people will prefer different things about different diamonds. At the end of the day all the numbers and photos in the world mean nothing if you do not like the diamond in person.

Many jewellers and diamond dealers will use terms like Hearts and Arrows, Ideal, Excellent, Russian Cut, Belgium Cut, Fine Make and others to describe their diamonds, with the intention of portraying them as ‘better’ than others. Be wary of accepting these terms as is. They are especially dangerous when assigned to diamonds by the jeweller or diamond dealer themselves without third-party independent support.

There are many different diamond grading laboratories available to the diamond-buying public. Some of the more well known grading laboratories are: GIA (Gemological Institute of America), DCLA (Diamond Certification Laboratory of Australia), AGS (American Gemological Society), HRD (Hoge Raad Voor Diamant; Diamond High Council), EGL (European Gemological Institute) and the IGI (International Gemological Institute).

Each of these diamond grading laboratories has their own criteria and method of grading loose diamonds, but they all operate within a high set of parameters, in regards to grading a diamond’s attributes and dimensions. Be aware that as each grading laboratory has its own methods, each grading laboratory also has its own expense guides for preparing a certificate and these grading laboratories differ in their standards and level of strictness.

It is important to keep in mind the fact that not all diamond grading laboratories are as well respected or as stringent in their grading as each other. Diamond grading laboratories should always be independent of any diamond retailers or wholesalers, to avoid any conflict of interests or bias. Diamond Certificates are only of value when they are issued by an independent accredited diamond grading laboratory. Always make certain to identify the source of the certificate or diamond grading report. If you have not heard of the laboratory, it could very well be associated in some way with the store, jeweller or diamond wholesaler itself, and so have a vested interest in aiding the sale.

Before you buy a diamond you should always, as a first priority, insist on an independent diamond grading certificate from an accredited laboratory to support any added claims about a diamond.  

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Some people said that yellow diamond ring is not worth to buy; some others said that colorless or other fancy colored diamonds are better. But, it’s that true? I don’t think so.

Sometimes, people have misperception about what is the meaning of yellow diamond. If you already learn about diamond 4C’s, you must be know that for a white diamond grading, there are color grading ranging from D (colorless white) to Z (light yellow). Yellow diamond is not a grade Z of white diamond grading, but it’s beyond that. That is why they called fancy colored diamonds.

Yellow diamond ring price could be more expensive than colorless white diamond. Yellow diamond gained its popularity several years ago when many celebrities give yellow diamond ring to his fiancée as an engagement ring.

Deep color natural diamonds are rare and therefore they are so expensive. While there are many pale color yellow diamonds, these diamonds are prized not so expensive and sometimes they categorizes as a white diamond grade Z color.

However, there are also manmade yellow diamonds. These diamonds are produced in laboratory. CVD (chemical vapor deposition) is the name of process to produce a synthetic diamond. With this process, people try to simulate the diamond forming process in the labs as in nature, of course, it’s much faster, and you don’t have to wait million years to get the diamonds.

Synthetic diamond qualities are getting better and better. So, if you want to buy yellow diamond ring with natural diamonds on it, you better buy the one that have certificate. Without diamond certificate, a normal person could be hard to telling the different between the real one with the synthetic.

Fancy Diamond Jewelry

Fancy color diamonds are unique and very rarely found diamonds. A fancy diamond is available in an array of colors such as red, pink, green, blue and various shades of yellow. These diamonds are valuable owing to their rarity and are the most valuable diamonds mainly because their color surpasses the GIA color scale. Fancy color diamonds are based on two features. The first is the basic color such as pink, blue, yellow, green, etc. The second is the concentration. Both the color features form the basis for determining the worth of the fancy colored diamonds. Generally, the more the concentration of the color, the more is the cost and the rarer will be the diamond.

Grading of fancy diamonds is done using nine categories such as light , mild light, faint, , , light fancy, fancy, dark fancy, intense fancy, deep fancy and vivid fancy. The most interesting factor of this diamond is that the secondary undertone is a plus if it enhances the color and the secondary undertone is negative if it detracts the color. Fancy color diamonds were found in Brazil, Australia, Venezuela and many parts of Africa as the conditions were suitable for the natural color to get developed.

Natural diamonds are rough diamonds as they are not cut or polished. The natural diamonds are found in Cubic, Octhahedra, Macle and Dodecahedron crystal shapes. In the earlier 1800s diamonds were located in riverbeds and were traded to noblemen who knew the value of the hard crystal. They used it for armor studding and later on kings and queens used to beautify their crowns and other jewelry. They were not identical to polish stones but were highly prized for their uniqueness. Diamonds became a major trade item and Brazil was the next to follow the development of diamond trade. Later Africa succeeded in diamond production. In the 1990s Canada entered the diamond rush and is believed to accomplish the position of being the world’s topmost diamond producer in next 20 years.

Gemstone jewelry is fun, exciting and also confusing. Gemstones are measured by size, weight, as well as both. The main unit used for weighing gemstones is the carat. Carats are segmented into 100 units known as points. For instance, half carat gemstone means the weight is .50 carats or points. Natural gemstones are available in nature. Similarly, the laboratory manufactured stones possess the same physical and chemical properties as other natural gemstones. Laboratory created stones fail to possess the rarity of natural colored stones and are less expensive. In fact, imitation stones are identical to natural stones in appearance, but may be of glass, plastic or any inexpensive stone. Gemstones undergoing some common treatments vary in many forms such as

• Heating a gemstone lightens, darkens or changes the color of gems, or improves the clarity of the gemstone.

• Irradiation can enhance the color to colored diamonds, gemstones and pearls.

• Impregnating certain gems with wax or resins or colorless oils brings variety of imperfections that are less visible but can work on the gemstones’ clarity as well as appearance.

• Filling cracks in gems using colorless plastic or glass improves the gemstones, durability and appearance.

• Dyeing enhances the color and improves the uniformity in the color in the gemstones and pearls.

• Bleaching reduces some gems, including pearls and jade.

GIA is an international non-profit gemological institute that appraises the value of loose diamonds. If you already have one or more GIA diamond rings, the stones were evaluated before they were set in the rings. The GIA set the tone for evaluating and analyzing diamonds and the same process is followed today by other diamond appraisal institutes, such as IGI appraisals. Such an appraisal is essential if you want to make sure that the diamonds you purchase are best value diamonds.
When you send loose diamonds to the GIA for grading, you will receive a report on each diamond. Reports of GIA diamond rings grading are extremely comprehensive, which is why you should be able to understand what the report says about the stones you have had appraised without too much trouble.
The date of the appraisal is always at the top of the report and there is a report number which is entered into the institute’s international database. If you wish, you can have this number laser inscribed on the diamond. The next part of the report on GIA diamond rings deals with the shape and the cutting style of the diamond.
The shape of the diamond has a lot to do with determining the setting of the diamond in the ring. The cuts include round, Princess, Marquise, oval and pear-shaped. Certain settings are suited to specific cuts to ensure that the diamond looks elegant in the ring and on the hand of the person wearing it. The most common settings for diamond rings are:
• Solitaire in which the diamond is secured in a basket of four or six prongs so that it catches the light with each movement of the hand.
• Sidestone settings have other stones on each side of the diamond to keep it in place and to add enhance the brilliance and color of the stone.
• Three-stone settings have a diamond for the past, present and future.
The report for GIA diamond rings, much like IGI appraisals, also gives the measurement of the diamond. For round diamonds this is represented by the minimum depth and length and for fancy diamonds by the length times width times depth. The overall weight of the diamond is given in carats and the more carats there are the more expensive the diamond will be. This is another way of knowing whether or not you purchased best value diamonds. One carat is 1/5 of one gram and the weight is recorded to the nearest 1/100 of a carat.
There is a GIA master comparison scale when grading the color of diamonds. The best diamonds are white and almost colorless. While yellow diamonds are given the lowest grade, there are canary yellow stones that are quite valuable. These fall into the category of fancy diamonds along with those that are pink, blue, and green.
The clarity or clearness of a diamond according to the rating scale of GIA diamond rings refers to any imperfections that can be seen when the diamond is analyzed under high-power microscopes. Those diamonds with slight imperfections can still be considered best value diamonds if the imperfections in the gems are such that they cannot be seen with the naked eye or under a normal microscope.
Diamonds for GIA diamond rings are graded according to their polish and finish to determine their level of brilliance and how they reflect the light that falls on them. The diamonds are inspected for smoothness and the number of facets in the stone. Symmetry is also important to ensure that all facets are in balance and to determine the best placement of several stones in a ring.
Gemologists use ultra-violet lights to determine the amount of fluorescence in the diamonds and this is also given on the report. Many other appraisal institutes do not provide a report that is as comprehensive as one you receive from GIA. Your report will contain diagrams of the stone as well as keys to the various symbols used in the report.

 Taylor-Burton Diamond 

As a status symbol big diamonds have no equal.  It shows that you have the ability to spend an extravagant amount of money on jewelry.  When not being displayed these beautiful gems are hidden away in secure locations and rarely see the light of day.  When was the last time you have seen the Esther Williams famous Champagne diamond ring or the Taylor Burton pear shaped diamond?

 Esthers Diamond 

Finding a good jeweler is the first step you need to take when purchasing any jewelry item.  It is also necessary to do some research on the grading system of diamonds.  Many good article are available on the internet to assist you in understanding the 4 C’s of diamond grading.  After you have learned the fundamentals your jeweler can clarify your understanding.

The American Gem Society (AGS), the Gemological Institute of America (GIA), and the International Gemological Institute (IGI) are the three most widely known and respected diamond grading laboratories in the world and each of them has developed a very similar nomenclature for identifying the 4 C’s of diamonds.  The 4 C’s stand for Carat, Color, Clarity, Cut and I like to add shape to the 4 C’s list.

The first of the 4 C’s is the Carat.  A carat is 0.2 grams or 200 milligrams and is always referenced within 2 decimal points. For example the the Golden Jubilee is considered the largest faceted diamond in the world and weighs in at 545.67 carts.  The Taylor-Burton diamond is 69.42 carats.  This is a highly accurate grading scale used to determine the weight or size of a diamond but it does not apply a value to the diamond.

Color Grading

 D to Z 

The next thing you need to look at when purchasing a diamond is the color of the diamond.  A white diamond is not white but clear in color.  Different colors in diamonds are produced because of impurities trapped in the diamond during the formation process.  Since nature rarely create anything pure many diamond will have show some color to the naked eye.  Color range from totally colorless (D) to a pale color (Z).  Diamonds of a higher grade than (Z) fall into the fancy color diamond range.  A diamond with a color range greater that (K) usually have a descriptive phrase such as grade (M) Faint Brown.

 White Diamond 

White diamonds are usually more expensive because of their rarity, D through F, but some diamonds in the fancy color range can command a very high per-caret price.  Pink diamonds have sold for up to $1,000,000 a carat.  The largest Fancy Vivid Pink diamond is the The Steinmetz Pink Diamond and is 59.60 carats in weight.

Clarity Grading is the third factor in determining the quality of a diamond.  This grading requires education and years of practice for a gemologists to master.  The number and nature of the defects in a diamond is taken into account when applying the clarity grading code.  Basically the diamond is looked at with the naked eye and under a 10X magnification lens.

Internally Flawless (I.F) when it presents no internal defects under 10x magnification.

Very slightly included (V.V.S.1 to V.V.S.2) when it presents defects that are very difficult to locate under 10x magnification.

Slightly Included (S.I.1 to S.I.2) when it presents defects that are easy to locate under 10x magnification.

Imperfect (P.1 to I.1) when it presents defects that are hard to locate with the naked eye.

Imperfect (P.2 to I.2) when it presents defects that are easy to locate with the naked eye.

Imperfect (P.3 to I.3) when it presents defects that are very easy to locate with the naked eye.

Next is the cut of the diamond and the cut has nothing to do with the shape of the diamond.  The proportions and symmetry of the diamond cut determines the light dispersion, brilliance or life of the diamond.  If the diamond’s reflective qualities are below standard then the appearance of the diamond will be adversely affected.  Many of the diamond cut over a couple hundred years ago were cut to maximize the carat weight with little regard to the diamond’s reflective qualities.  Many of the older stones have been recut to increase its brilliance.  A good cut give the diamond it brilliance or the ability to handle light in a pleasing fashion.  The brightness will seem to come from the very heart of a diamond.

 American Star 

In 2001 the EightStar company of California wanted to prove that optical perfection of the round brilliant diamonds could be obtained by using an exclusive light-tracking instrument called a FireScope which allows a diamond cutter to align facets so precisely that the flow of light into and out of a diamonds can be completely controlled.  The American Star as slowly cut from 14.89 to 13.42 carats over a six-week period.  Cutting the diamond for maximum light output and not size increased the beauty of the American Star and many of the older diamonds have gone through a recut.

There are several standard categories for the shape of the diamond but there are many variations on each standard categories.  Basic categories include Round, Emerald, Pear, Heart, Marquise, Oval, and Princess cuts.

The final shape of the raw diamond us usually determined by the imperfections found in the diamond.  Many imperfectsions can be remove or hidden by and experienced jeweler in mounting the diamond in the final jewelry piece and by the proper cut of the diamond.

The Gemological Institute of America (GIA), the American Gem Society (AGS), and the International Gemological Institute (IGI) are the three most widely known and respected diamond grading laboratories in the world.  Each of the grading laboratories have developed a very similar nomenclature for identifying the 4 C’s of diamonds.

 D to Z 

Color grading scales used by the internationally recognized laboratories (GIA & IGI for example), ranges from totally colorless (D) to pale yellow or brown color (Z).  Brown diamonds darker than K color are usually described using their letter grade, and a descriptive phrase, for example M Faint Brown.  Diamonds with more depth of color than Z color fall into the fancy color diamond range.

The coloration of diamonds can be caused by several factors.  Impurities trapped in the diamond during its formation, the crystal lattice structure of the diamond, and the exposure to radiation can all lead to the wide verity of colors available in diamonds.

 Yellow Diamonds 

Yellow diamonds are colored because of the impurities that are trapped inside diamonds when they are created.  If a few of the millions of carbon atoms have been replaced by nitrogen atoms, then structure of the diamond will not be significantly altered but the clarity will be changed.  The amount of color displayed is dependent on the amount of nitrogen involved.

When we see color it is because the object we are looking at reflected a specific wavelength of the light spectrum.  A good example of this is a yellow flower.  The flower absorbs all of the light except the yellow light, which is reflected by the yellow flower.

 Blue Heart Diamond 

In the case of a blue colored diamond some of the nitrogen has been replaced by Boron.  Boron will reflect the blue wavelength of the light spectrum.  The higher the concentration of boron the more color will be showed.  At a level of one or a few boron atoms for every million-carbon atom, an attractive blue color results.

 Graff Pink Supreme Diamond 

The pink diamonds comes in shades ranging from a pastel rose, such as the Pink Orchid to intense purple-reds of the Moussaieff Red, and the price is determined by the intensity of the color.  Pink diamonds have sold for up to $1,000,000 a carat.  Unlike the Type I diamonds that derived their color from impurities embedded in the diamond, Pink diamonds are considered a Type II and get their color from a process known as Plastic Deformation.

Type II diamonds have very few if any nitrogen impurities in them.  They get their coloration due to structural anomalies caused by Plastic Deformation during the crystal growth.  The intense pressure changes the lattice structure of diamonds and has led to the formation of Pink, and Red colored diamonds.

 Green Diamond 

A natural diamond coming into contact with a radioactive source at some point during its lifetime causes some diamonds to develop a green coloration.  The time required may be as much as a million years or longer.  Green diamonds of this nature are very unique.

The most common form of irradiation diamonds comes from alpha particles found in uranium compounds or from percolating groundwater.  Green spots on the surface of the diamonds or a thin green film may develop on the skin of the diamond after long exposure to these particles.  Many times this green coloration will be removed during the cutting or faceting process.

Bombardment by beta and gamma rays will color the diamond to a greater depth and in some rare case turn the entire stone green.  Heating to temperature to just below 600 degrees Celsius can sometimes also cause a diamond to develop a green ting.  Higher temperature may turn the stone to a less desirable yellow or brown color.

 Black Diamond 

Black diamonds are found only in Brazil and the Central African Republic.  Approximately 600 tons of conventional diamonds have been mined, traded, polished since 1900. But not a single black diamond has been discovered in the world’s mining fields.  The geological settings where diamonds are found or mined are virtually identical with the one exception, the Black Diamond.

Black diamonds have been found to contain trace elements of nitrogen and hydrogen.  The study published in 2006 analyzed the hydrogen in black diamond samples using infrared-detection instruments and found that the quantity indicated that the mineral formed in a supernova explosion prior to the formation of the Solar System.  These diamonds were formed by carbon-rich cosmic dust in an environment near carbon stars. The diamonds were incorporated into solid bodies that subsequently fell to Earth as meteorites.

Shine and luster of the diamond compel and attracts all of us towards it. Most of us loved diamond studded jewellery and like to possess diamond as it is considered as a status symbol. Diamond studded jewellery are quite popular and are treasured, and among them diamond ring is one of the most loved jewellery that is bought by most of the people. A diamond ring worn hand will easily catch the attention of people in a crowd. Although diamond since long has been treasured for their hardness and rarity, but they were not so beautiful in the beginning. Diamond that we see today is the outcome of the hard work and research of the jewelers of that period. After lot of experiment and research they came out with the fantastic cuts to impart a glowing effect from the diamond. It was after this only that diamond was started to be used in jewellery and become a highly possesses items.

The size and quality of a diamond is measured by carat, which is exactly 200 milligrams. A diamond ring with a full carat diamond is expensive. There are the four C’s involved with defining the quality and price of a diamond ring. One should remember that in buying diamonds rings, he should not only look at the designs but also the four C’s properties like the clarity, the carat, the color and the cut. The carat is referred to the weight of the diamond that is we can say that larger the diamond, the more valuable it becomes. This will largely determine the price of the diamond ring that one will buy. Often, stores provide with the record of the properties of each diamond ring that they have on display. Clarity refers to the clearness of the gemstone. The color as the name suggests refers to the color. The cut refers to the way the diamond is cut to enhance its brilliance.

To make the best decision while buying a diamond ring, one should have complete knowledge about diamond and diamond rings. This will further help in understanding one’s requirement and will be clear in mind as to what exactly he is looking for. If a person do not have any knowledge about diamonds, he will simply go and buy the rings which he found attractive or as per the salesman choice. In order to query the salesman and to get complete information about the ring one should be aware of the queries that one has to make. This will make shopping much easier and enjoyable as we all love to shop for a product of which we have a complete knowledge.

One must undertake an extensive market search before buying the diamond rings and do not forget to include the online market apart from the traditional diamond market. This will give one idea about the latest trend prevailing in the market and the prices that are charged of the ring of different weight. It will also help one to get a better deal after all, the diamonds are not purchased every single day and there is no use of buying them unless they are of good quality and able to serve their purpose.