Research & News
Blue Diamonds Have 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.
2018 GIA Symposium
Scientists and business leaders will gather at a summit of the gem and jewelry industry.
Exhibition Review: Green Diamonds: Natural Radiance
Review of Green Diamonds: Natural Radiance at the Natural History Museum of Los Angeles.
Robust Demand Brings Increased Rough Diamond Sales
Demand for diamonds has been good so far this year. Rough sales have increased and large diamonds are being mined. Plus: Online sales tax changes.
Fancy Deep Brown-Orange CVD Synthetic Diamond
A CVD-grown diamond shows an unexpected treatment-caused color.
Turquoise from Western Arkansas
A report on turquoise from the only known U.S. deposit outside of the Southwest.