copper bearing Archives - The Jewelry Magazine https://www.thejewelrymagazine.com/tag/copper-bearing/ Latest Jewelry News From All Around The World Tue, 04 Feb 2020 07:08:20 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 Gems & Gemology Devotes Winter 2019 Issue to Colored Stone Origin https://www.thejewelrymagazine.com/gems-gemology-devotes-winter-2019-issue-to-colored-stone-origin/ https://www.thejewelrymagazine.com/gems-gemology-devotes-winter-2019-issue-to-colored-stone-origin/#respond Tue, 04 Feb 2020 07:07:59 +0000 https://www.thejewelrymagazine.com/?p=15604

Includes detailed explanations of GIA’s origin determination procedures The Winter 2019 Gems & Gemology (G&G), the latest edition of GIA’s (Gemological Institute of America) quarterly professional journal, is devoted to an important discussion of the science, issues and limitations of geographic origin determination for colored stones by gemological laboratories. “Origin determination for colored gems is […]

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