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Unusual Curved Colour Zoning In Emerald

Nathan Renfro, Vincent Pardieu, and Supharart Sangsawong, GIA, July 1, 2013

A report on a 1.17 ct emerald obtained in Kabul, Afghanistan for GIA's permanent reference collection

Spring 1991 G&G Lab Notes

March 1, 1991

This section, from the Spring 1991 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.