This section, from the Summer 1990 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
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Recent lab examination reveals that traditional treatments such as calcium fluoride coating are still prevalent in the trade, and great care must be taken to identify them.
Read MoreThis section, from the Summer 2000 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
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The New York lab encountered another large HPHT-treated diamond that showed stronger pink colouration.
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This section, from the Summer 2009 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreThis section, from the Summer 1992 issue of Gems & Gemmology, is a compilation of interesting finds from GIA's laboratories.
Read MoreThis section, from the Summer 1988 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreThis section, from the Summer 1989 issue of Gems & Gemmology, is a compilation of interesting finds from GIA's laboratories.
Read MoreThis section, from the Summer 2002 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreThis section, from the Summer 1995 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
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