Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
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GIA researchers analysed more than 90,000 natural pink diamonds to better understand how these rare and beautiful diamonds formed and got their colour.
Read MoreThese red, pink and orange hued gems evoke passion and excitement – and are sure-fire accessories for sultry summer days.
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A diamond examined in the Carlsbad lab shows chameleon colouring in an unusual pattern.
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A natural Fancy Intense blue diamond submitted to the New York lab shows the highest boron concentration ever reported in a natural specimen.
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A cape diamond examined in the New York lab shows rare yellow phosphorescence.
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The decay of the transient 2800 cm–1 absorption peak in a Fancy grey diamond is observed.
Read MoreReviews diamond discoveries at the Lomonosov deposit, as well as the geology of the Arkhangelsk kimberlite province.
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Some of the world’s rarest fancy coloured diamonds are on display in Los Angeles until March 2017 − but you can see some photos of them here.
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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