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A blue diamond with inclusions under the table is held up in tweezers.

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Where Do Blue Diamonds Come From? Blue Diamonds Have a Surprising “Superdeep” Origin and a Link to Ancient Oceans

Evan M. Smith, August 1, 2018

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.

Article

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

GIA, December 16, 2016

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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