Winter 2017 - Volume 53, Issue 4
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Accurate Reporting of Key Trace Elements in Ruby and Sapphire Using Matrix-Matched Standards

Presents a group of corundum standards developed by GIA to improve the accuracy and efficiency of its laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) instruments.

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Synthetic ruby overgrowth on natural sapphire seed.
Two Unusual Natural Sapphires with Synthetic Ruby Overgrowth

For the first time, the Carlsbad and New York labs see natural sapphire seeds with synthetic ruby overgrowth.

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