Lab Notes Gems & Gemology, Volume 48, No. 1

Spring 2012 G&G Lab Notes

Artificially Irradiated Type IIb Diamond
Type IIb Green Diamond, Natural and Synthetic
Diamond with Unusual Color Zoning
Large Emerald with Gota de Aceite Structure
Update on Artificial Metallic Veining in Manufactured Gem Materials
Shell-Nucleated Freshwater Cultured Pearls
Lazurite Inclusions in Ruby
A Coated Shell Assemblage
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