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<em>Gota de Aceite</em> in an emerald from Zambia.
Gota de Aceite in a Zambian Emerald

A phenomenon usually seen in Colombian emeralds is found in a specimen from Zambia.

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Summer 1994 G&G Lab Notes

This section, from the Summer 1994 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

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Summer 1992 G&G Lab Notes

This section, from the Summer 1992 issue of Gems & Gemmology, is a compilation of interesting finds from GIA's laboratories.

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Spring 2012 G&G Lab Notes

This section, from the Spring 2012 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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Autumn 2008 G&G Lab Notes

This section, from the Autumn 2008 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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Winter 2007 G&G Lab Notes

This section, from the Winter 2007 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

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Arabic Writing in Emerald Crystals
Spring 2006 G&G Lab Notes

This section, from the Spring 2006 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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Winter 2003 G&G Lab Notes

This section, from the Winter 2003 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

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Spring 2001 G&G Lab Notes

This section, from the Spring 2001 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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Spring 1999 G&G Lab Notes

This section, from the Spring 1999 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

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