Mineral inclusions trapped in diamonds reveal the continents’ construction – and help GIA researchers date diamonds.
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Don’t judge a yellow gem by its colour alone. A variety of gemstones also come in shades of yellow, from diamonds to citrine to garnets.
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GIA scientists recently presented their latest research on diamond tagging and the cause of grey-blue-violet colour in diamonds.
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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 MoreThis article describes what is known about the Wittelsbach Blue since it was first reported in 1666, and the gemmological information released to date on this diamond.
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This study uses both historical information and modern data to create a computer model of the Tavernier Blue, orienting the finished diamond within the original diamond crystal.
Read MoreSumitomo Electric Industries is producing gem-quality synthetic yellow diamonds in deep yellow single crystals in sizes up to 2 ct.
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With the use of modern tools and technology, this article sheds light on the history and provenance of both the French Blue and the Hope diamonds.
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