A rare chameleon diamond is examined in GIA's Carlsbad lab.
Read MoreChameleon diamonds are among the rarest of gem diamonds.
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A diamond examined in the Carlsbad lab shows chameleon colouring in an unusual pattern.
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A cape diamond examined in the New York lab shows rare yellow phosphorescence.
Read MoreThe 187.63 ct rough diamond from Canada’s Diavik mine shows surprising reactions to ultraviolet light.
Read MoreReview of Green Diamonds: Natural Radiance at the Natural History Museum of Los Angeles.
Read MoreNatural diamonds exhibit characteristics normally seen in synthetic material.
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Summarises data collected on more than 15,000 natural blue/grey/violet diamonds examined by GIA during the last decade and examines the mechanisms that produce this colour range.
Read MoreNumerous natural-colour coloured diamonds from the Aurora Butterfly of Peace and other collections were studied using a new type of fluorescence spectrometer.
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Characterises a suite of 40 natural brown to black diamonds from this deposit so that they can be distinguished from suspected treated black diamonds.
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