March Meeting

Thursday, Thursday 20th, 2018
Speaker: Dr. G. Nelson Eby
Topic: Using Chemistry to Identify the Source of Emeralds

The formation of emerald (the gem form of beryl) requires the presence of Be, the chromophore elements Cr or V, and fluids. Emerald forms in a wide variety of rocks and geologic settings. The interplay of the source materials and fluids leads to different elemental distributions in the emeralds which can often be related to a particular emerald belt or in some cases specific emerald mines. This presentation will describe the crystal chemistry of emerald and illustrate how elemental chemistry can be used to determine the emerald source

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