A timeless creation – this brooch radiates grace and class. Clear crystals in the classic pavé setting go a long way to fashion a dignified look of elegance. Wear the brooch and make a statement of being in style – always.
Price: GBP 70.00
A timeless creation – this brooch radiates grace and class. Clear crystals in the classic pavé setting go a long way to fashion a dignified look of elegance. Wear the brooch and make a statement of being in style – always.
Price: GBP 70.00
HPHT Treated Diamond
History of HPHT
The history of HPHT treatments dates back to 1955, when the General Electric Company first discovered the process for creating diamonds in the laboratory. This led to the creation of HPHT process, whereby GE first created a press where the required pressure and temperature could be maintained for the process. One thing led to another and HPHT treatment evolved through various presses like the tetrahedral, BARS and finally the cubic press. What began as an experiment for diamond color modification in synthetic diamonds has today evolved into usage for natural diamonds also.
Usage of HPHT Diamond Enhancements
HPHT treatments basically serve two purposes
Creating synthetic diamonds: To obtain synthetic diamonds, carbon is put inside a grapite capsule. A seed is then inserted into this capsule and a catalyst is added. The diamond grows on the seed while the catalyst enables the crystallization to take place.
Color modification: Different type of diamonds react differently when exposed to HPHT treatments and a range of colors are obtained. For example, diamonds containing aggragated nitrogen, when exposed to HPHT can cause it to become single substitution nitrogen. In such cases, diamonds having green, orange and yellow hues can be created. In diamonds where nitrogen is negligible, the process is often used to produce colorless diamonds. Thus brownish diamonds when HPHT processed can obtain a colorless hue. A light pink color may also be obtained in some cases. In case of diamonds with negligible nitrogen and presence of boron, HPHT can alter the color. Thus brownish diamonds will lose the brown tone and boron will make the stone bluish in color.
Popular presses used for treatment
Belt presses: This was the initial form of press used for treatment. Here pressure is created by the usage of two high strength pistons that provide equal pressure in opposing directions on a sample. A series of rings surround the sample in order to contain the pressure.
Torid press: In this method, the two pistons apply pressure in a single vertical direction.
Cubic press: This uses many pistons that provide pressure from different directions. It is also known as a tetrahedral press.
Procedure of HPHT
If a customer intends to give diamonds for this treatment, the following procedure is used,
Pricing of treatments: Cost for these treatments varies with the size of the diamond. Also the total number of stones given and additional services like repolishing are charged extra. While these treatments are expensive,
Organizations and HPHT
Because HPHT is controversial, different bodies follow different guidelines for HPHT. As per the Federal Trade commission, HPHT treated diamonds must be disclosed to the user. General Electric follows this norm and all diamonds that are HPHT treated are laser inscribed with the terms ‘HPHT PROCESSED’, IRRADIATED. If GIA notes diamonds to be HPHT treated, it also specifies them as ‘HPHT ANNEALED’ or ‘Artificially Irradiated’. Such details are displayed prominently on the grading report under ‘origin’ in the ‘color’ section of the report.
Pros and cons
The HPHT treatment of diamonds is a controversial issue because it has both advantages and disadvantages. These are further discussed as under.
Advantages
Disadvantages
Disclosure
As HPHT has become more commercially available, today there are various methods available to detect if your stone has been HPHT processed or not. At the basic level diamonds over 0.5 carat can only be HPHT treated. A trained gemologist may use equipment like the SSEF spotter and crossed polarization filter to detect the same. DiamondSure is also used to separate cape diamonds from the rest. At the next level FTIR and UVVIS spectroscopes are used and synthetic and PT treated diamonds can easily be identified ere. Besides this, renowned laboratories have many other proprietary procedures that they use to identify such diamonds.
With all sophisticated equipment it continues to be difficult to detect HPHT processed diamonds at many instances. It is thus important that you purchase diamonds from a trusted vendor online or offline. Diamonds accompanied with a certificate from a reputed laboratory like GIA also ensure that diamonds are completely natural. You could also choose signature or top of the line branded diamonds to protect yourself. Finally, if you cannot afford GIA stones, make sure to opt for a diamond that is accompanied by a certificate from a renowned laboratory.
Engagement rings, pre – set rings, loose diamonds, bracelets, earrings, pendants, necklaces you name it and you have the whole range in front of your eyes. Diamonds have been a lady’s best friend for ages, even today; the saying goes as a timeless charm. It’s a beauty- the hardest material in the world has a charm which you will not find in anything else. Cut out with beauty after painful hours of labor, these are yet not affordable by many. To posses a diamond is a thing in itself. The beauty of diamond is, certainly, timeless. The price of the diamond jewellery basically depends upon the cut, clarity and purity of diamond. Diamonds are generally classified as Natural Diamond, Synthetic Industrial Diamond and Thin Film Diamonds on the base of their appendage of creation. The phrase “diamond” is gained from a Greek articulate “diamond” which corresponds “invincible”.Diamonds can be scientifically assorted into four characters, called type 1a, 1b, 2a, and 2b. Before you buy a diamond, you must know the four Cs of diamond – color, clarity, cut and carat. Depending upon these four, one should choose a diamond. Diamonds are found in three basic colors – white, blue, brown and pink. Out of these pink is still a rarity and can cost a fortune for one to be able to buy it. White is the most basic and most common form of diamond sold worldwide. Then comes the brown and black. As black diamond is considered good for Black Magic, it is most sought after by magicians and is hence priced high. They say the clearer the diamond, the better the diamond and so is the price. The best way to check it is to see through a microscope available with jewelers before buying a diamond whether embedded or non – embedded. The more the cut, the costlier the diamond. This is because; it is really tough to cut a diamond and moreso making a design on it. The last thing the carat. For all good reasons, the bigger the size or the heavier the weight of the diamond, more would be its price. As, buying diamond involves a lot of money, the place you are buying it from should be reliable. Online shopping stores are one of the places upon whom you can rely. Authenticated, these are the places which give you an authenticity or guarantee that the diamond you are buying is the real one. To buy from one, just log on to any of the websites of online shopping stores and get the best of the diamonds at affordable prices and that too at your doorstep!!
Diamonds are believed to be the symbol of love and passion. ’A diamond is forever’; from the past to the future diamond is a stone that will never lose its value and beauty. Diamond jewellery is exceptional and timeless. The use of diamond in the jewellery makes it so stunning that nobody can resist it. Diamonds refract light and it was first discovered in India 3000 years back. Diamond is the hardest of all the gemstones and so is more durable. In old times diamond was made by giving incredible heat and pressure to carbon under the surface of the earth. The Greeks believed that the diamonds are the particles of stars fallen on earth and some of them assumed them to be the tears of God.
The jewellery of diamond is an outstanding creation. Diamonds come in different qualities but they are given the finishing touches to enhance their clarity before using them in the jewellery. You can find an exclusive collection of diamond rings, earrings, bands, bracelets, belts and watches to choose from. Diamond rings are excellent choice for engagements and weddings as diamond signifies love, purity and commitment. Diamond rings can make perfect gifts for your special one. Various cuts of diamonds are used in the jewellery. Some of the famous cuts of diamond include; brilliant cut, princess cut, emerald cut and heart shaped diamonds.
Diamond is found in a variety of beautiful and alluring colors. Most people think that only white diamond is available. But unfortunately they are wrong because they have little knowledge about diamonds. Diamond also comes in different hues of pink, black, champagne, green blue and purple. The vivid pink diamond is very rare and so is the most expensive of all colored diamonds.
Pink diamonds are mainly found in Argyle mine. This rare stone includes the shades from soft rose pink to deep raspberry pink. All shades in pink look tremendous. The use of pink diamonds in jewellery gives a very sophisticated look which makes the pieces more feminine. Previously white or colorless diamond was the most widely used color but now all the colors of diamonds are used commonly in jewellery. The lustrous black diamond is usually used in men’s jewellery. Black diamond makes perfect combination with platinum.
Diamonds are very expensive because it requires a lot of labor to get these precious gemstones out of the earth. Buying diamond jewellery is a big investment. Before buying a diamond article you should research the market thoroughly to get the best jewellery as it is very costly and one can buy a single or a few diamond items. So for buying the right type and high quality of diamond, well reputed jewellery should be selected. Moreover the four parameters i.e. the famous 4 C’s; clarity, carat, color and cut should be considered. These points are all very crucial while purchasing diamond items.
Diamond jewellery has an eternal beauty which none other gemstone has. Diamonds are preferred by women all over the world as they look very elegant and can be worn with any type and style of outfit. Female watches with diamonds make them glamorous and stunning. The diamond articles have very high prices because they are worth it. Jewellery portrays your personality and when you wear diamond jewels they reflect the good taste and excellent choice of jewellery.