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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Specimen sold as black diamond identified as ceramic material commonly used in hard-plating applications
Read MoreThe 1990s witnessed important developments in the commercial viability of gem-quality synthetic diamonds.
Read MoreWhite, pink and black nontransparent synthetic "cubic zirconia" is currently being manufactured in Russia and marketed primarily in cabochon and bead form.
Read MoreThe author has uncovered many ancient references to the simulation or enhancement of gemstones.
Read MoreContrasting the physical properties of diamond with colourless specimens to identify the most problematic diamond simulants.
Read MoreAn examination of the skull-melting technique used to produce cubic zirconia, first introduced in 1976, as well as the market status of this diamond simulant and information about its production and quality.
Read MoreImitation diamonds such as CZ and moissanite have been popular for decades. Learn about their properties and how they compare to diamonds.
Read MoreOver the past several years, diamond simulants have entered the market that consist of colourless cubic zirconia reportedly coated with a thin layer (e.g. represented to be 30–50 nm) of nanocrystalline diamond particles embedded in a matrix.
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.
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