how to identify hpht diamonds?
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Gemologists can detect HPHT diamonds using special detection equipment, and GIA includes any diamond treatment in its reports. Because there is no way to see if a diamond has been treated, it is important to have a diamond grading report from an independent lab like GIA.
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For the best value in what would appear to the naked eye as a colorless diamond, look for G-J diamonds. Because color is easier to detect in larger diamonds, opt for G-H in diamonds over 1 carat, and I-J for those under 1 carat. ... The seller is only estimating the diamond's color using GIA terminology.
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Jewelry Stores sell Diamonds (like Tiffany), and those Jewelers WILL Guarantee GIA Certified Diamonds! Tiffany sells Diamonds with Faint Fluorescence, so your Diamond could possibly look Milky, Foggy or even Hazy (as well as glowing-in-the-dark).
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They look larger than round diamonds too. Because of their elongated shape, oval diamonds often appear larger face-up than round diamonds of the same carat weight. And in fact, many oval diamonds do have a larger surface area.
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Diamond Carat Weight Measures a Diamond's Apparent Size To put it simply, diamond carat weight measures how much a diamond weighs. A metric “carat” is defined as 200 milligrams. Each carat is subdivided into 100 'points. ' This allows very precise measurements to the hundredth decimal place.
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['Alrosa – Rough diamonds.', 'Rio Tinto – Argyle Diamond Mine.', 'Harry Winston – The One, Oval-Shaped Diamond Micropavé Engagement Ring.', 'Tiffany & Co – The Tiffany® Setting Engagement Ring in Platinum.', 'Cartier – Solitaire 1895.', 'De Beers – Old Bond Street Solitaire Ring.']
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A Diamond's Carat Weight Carat (ct.) is the unique weight scale that is used to measure diamonds and other gems. One carat is divided into 100 points so a diamond of 150 points weights 1.50 carats.
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Because they are formed deep within the earth, under extreme heat and pressure; virtually all diamonds contain "birthmarks"; small imperfections inside the diamond (called inclusions), or on its surface (called blemishes). Clarity refers to the degree to which these imperfections are present.
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Carefully drop the loose diamond into the glass of water. If the stone sinks, then you know it's a real diamond. If it floats underneath, or at the surface of the water, then it's a fake diamond. The reason: Real diamonds have high density, while fake diamonds don't.
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['What are the 4Cs of this diamond? ... ', 'Does this stone have a grading report? ... ', 'What are the properties of the metal this ring is set in? ... ', 'Can this ring be modified? ... ', 'What are my payment options?']
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For round brilliant cut diamonds, we think the J color grade can be an excellent choice. While J color diamonds do have a very slight color, the round brilliant cut's facet pattern and its ability to reflect light means you won't notice this color once it's set in a solitaire ring.
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Lab grown diamonds are chemically the same as mined diamonds, and one of the only ways to tell the difference is for a gemologist to look under a magnifier for a laser inscription on the girdle of the diamond and determine the origin. Wilhite said Metal Mark does not sell any man-made diamonds.
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K Color Diamonds Offer Great Value: Diamonds in the K-L-M color range fall within the “faint yellow” classification. However, they actually face-up white with barely a hint of color. Keep in mind that you'll be looking at a diamond in real-world circumstances.
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Lab diamonds are man-made diamonds that consist of actual carbon atoms arranged in the characteristic diamond crystal structure. Simulants do not have the same chemical and physical properties as diamonds, and merely imitate the appearance of a diamond.
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While there are differences in color between D, E, and F diamonds, they can be detected only by a gemologist in side by side comparisons, and rarely by the untrained eye. D-F diamonds should only be set in white gold / platinum. Yellow gold reflects color, negating the diamond's colorless effect.
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All GIA graded diamonds have a unique serial number laser inscribed on the girdle which enables you to match the diamond to its certification. If you look carefully, you can see the inscription on the girdle of the diamond below. All Taylor & Hart center diamonds are GIA-graded and come with a GIA certificate.
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['Select a fresh, clean surface on the specimen to be tested.', 'Hold the specimen firmly and attempt to scratch it with the point of an object of known hardness. ... ', 'Press the point of the crystal firmly against the surface of the unidentified specimen.']