How variations in UV lamp output can affect observed fluorescence colour and intensity.
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A new microlithography process developed to create high-resolution diffraction grating patterns on portions of certain facets can improve the dispersion of light and thus the amount of “fire” in a diamond.
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Knowledge of type allows gemmologists to better evaluate if a diamond might be treated or synthetic, and whether it should be sent to a laboratory for testing.
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This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.
Read MoreDe Beers has produced a faceted synthetic gem-quality diamond that could go unrecognised without careful gemmological testing.
Read MoreA treatise on the design, display, care and repair of fine gemstones.
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It is anticipated that production of diamonds from the sea will increase substantially in the future.
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The Oved Diamond Company’s new glass formulation is tested with mixed results.
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This article illustrates the various features in filled diamonds and explores the best techniques for examining them.
Read MoreModern gemmologists and diamantaires are faced with a broad spectrum of colour and clarity treatments ranging from the simple to the highly sophisticated.
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