Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
Read MoreProvides a visual guide to the internal features of natural, synthetic and treated rubies.
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Circumnavigate the boreal reaches of the globe to explore gems from polar regions.
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Inclusions in technogenic ruby slag help to separate this material from other specimens, both natural and synthetic.
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G&G Brief presents an overview of the content of the Summer 2015 issue of Gems & Gemology.
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Natural gemstones are typically far more valuable than synthetic ones, so being able to identify them correctly is a powerful skill.
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How to examine a sapphire crystal for cracks and inclusions.
Read MoreSome manufacturers are known to have treated Verneuil flame-fusion synthetic rubies by immersion in a flux melt to induce patterns like the “fingerprints” seen in some natural rubies.
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The authors present the mineralogical and gemmological properties of rubies found recently in the Morogoro area of Tanzania that have many features in common with rubies from Myanmar (Burma) and other comparable marble-type deposits.
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Gem-quality rubies and pink to purple sapphires are being recovered from the Luc Yen and Quy Chau mining regions of Vietnam.
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