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Opal with six-rayed star
Star Opal

An opal featuring a rare six-rayed star is examined in GIA's Bangkok lab.

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Summer 2012 G&G Lab Notes

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

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Winter 2011 G&G Lab Notes

This section, from the Winter 2011 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.

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Summer 2007 G&G Lab Notes

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

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DiamondView Images of Rubies
Autumn 2004 G&G Lab Notes

This section, from the Autumn 2004 issue of Gems & Gemology, is a compilation of interesting finds from GIA's laboratories.

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Spring 2004 G&G Lab Notes

This section, from the Spring 2004 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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Autumn 2003 G&G Lab Notes

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

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Summer 2003 G&G Lab Notes

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

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Spring 2003 G&G Lab Notes

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

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Autumn 2001 G&G Lab Notes

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

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