A report on the colour treatment process for these intensely greenish yellow to yellowish-green cultured pearls and the techniques for identifying them.
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Located near the Arctic Circle, Diavik is one of the world’s richest diamond deposits and a leader in sustainable mining.
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Determines whether blue zircon, inadvertently altered to brown by exposure to long-wave UV radiation, can be restored to its original colour through the use of incandescent light.
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Examines Jaipur’s role as a coloured stone cutting and jewellery manufacturing centre, with profiles of 17 companies and their factory, trading and retail operations.
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A look at the gemmological properties and chemical composition of this light blue to light green to green gem material, which is suitable for cabochon cutting.
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Explores statistical data and defining characteristics of gem-quality CVD synthetic diamonds examined by GIA since 2003.
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Presents the underlying physics and methodology of this analytical technique, which has become an essential tool in identifying treated and synthetic diamonds.
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This type of pink pyrope garnet, believed to have been mined in Tanzania, shows a distinct colour-change phenomenon resulting from its unique chemical composition.
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Explores the history, geology and current production of this unique source of large diamonds.
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A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.
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