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Summer 1986 G&G Lab Notes

June 1, 1986

This section, from the Summer 1986 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

Summer 2009 G&G Lab Notes

June 1, 2009

This section, from the Summer 2009 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

Summer 1983 G&G Lab Notes

June 1, 1983

This section, from the Summer 1983 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

Turquoise with Fingerprint Pattern

Tara Allen and Amy Cooper, October 17, 2013

A fingerprint pattern, possibly left by human skin oils during the assembly process, is observed in natural turquoise beads.