It is a rare occurrence when a diamond simulant submitted to a GIA laboratory turns out to be a natural gemstone.
Read MoreSynthetic moissanite is much closer to diamond in overall appearance and heft than any previous diamond imitation; this article reports on how to identify and characterise it.
Read MoreContrasting the physical properties of diamond with colourless specimens to identify the most problematic diamond simulants.
Read MoreWhen General Electric created the first gem-quality synthetic diamonds in 1971, the first place the company sent them after cutting was to GIA for examination and research. In the 44 years since then, GIA researchers have closely followed the development of laboratory-created diamonds – from those early experiments to the production of commercial quantities in the gem market.
Read MoreExamination of 51 colourless to near-colourless synthetic diamonds from all known sources of production confirms that they can be distinguished from similar-appearing natural diamonds on the basis of their gemmological properties.
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The Gem Testing Laboratory in Jaipur identified a black diamond-like specimen as boron carbide, a ceramic material typically used in nuclear, military, and aerospace applications.
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Report on the analysis of an unusually large CVD synthetic diamond, unique in that its Faint to Light pinkish brown colour doesn’t appear to be the result of post-growth treatment.
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Specimen sold as black diamond identified as ceramic material commonly used in hard-plating applications
Read MoreThe US Copyright Office granted what is believed to be the first copyright registration covering a gemstone design.
Read MoreImitation diamonds such as CZ and moissanite have been popular for decades. Learn about their properties and how they compare to diamonds.
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