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A blue diamond with inclusions under the table is held up in tweezers.
Article
Where Do Blue Diamonds Come From? Blue Diamonds Have a Surprising “Superdeep” Origin and a Link to Ancient Oceans

This is an extended abstract of the article ‘Blue boron-bearing diamonds from Earth’s lower mantle,’ published in the 2018 August issue of Nature. GIA researcher Evan Smith is the lead author of the article.

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Article
Large, Rare Diamonds Reveal the Inner Workings of Earth’s Mantle

This is an extended abstract of the article ‘Large Gem Diamonds From Metallic Liquid in Earth’s Deep Mantle,’ published on 16 December 2016 in Science magazine. GIA Postdoctoral Research Fellow Evan Smith is the lead author of the article.

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Abstracts; Autumn 2006

This article, from the Autumn 2006 issue of Gems & Gemology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemology.

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Mint-green chrysoberyl.
Distinguishing Between Natural and Synthetic Green Chrysoberyl

Overview and commentary on the 2013 Journal of Gemmology article “Natural and synthetic vanadium-bearing chrysoberyl”.

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Diamond from Mir Mine in Russia
A Glimpse into the Russian Diamond Trade

Overview and commentary on the 2013 Russian Diamonds and Jewellery article “New Reality of the Russian Jewellery Market”.

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Linarite from Hoppel Collection
What Possesses Bidders at Auction? This Article Offers Some Clues

Overview and commentary on the 2013 Rocks & Minerals article “The Heritage Auction of the Hoppel Collection”.

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Sapphire crystals
Beryllium in Blue Sapphires, Both Natural and Diffusion-Treated

Overview and commentary on the 2013 InColor article “Blue Sapphires and Beryllium: 'An Unfinished World Quest'”.

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HOC synthetic alexandrite inclusion.
Challenges in Orienting Alexandrite: The Usambara and Other Optical Effects in Synthetic HOC-Grown Russian Alexandrite

Overview and commentary on the 2013 Journal of Gemmology article “Synthetic alexandrites grown by the HOC method in Russia: Internal features related to the growth technique and colorimetric investigation”.

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Abstracts; Summer 2006

This article, from the Summer 2006 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

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