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Flux-Grown Synthetic Ruby with Hydrothermal Synthetic Seed Crystal

Ziyin Sun and Dino DeGhionno, July 25, 2014

An unusual synthetic ruby, combining a hydrothermal ruby seed and flux ruby overgrowth, is examined at the Carlsbad lab.

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.