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花火。クラゲ。銀河。稲妻。オパールの万華鏡のようにきらめく様子は他の宝石にはみられません。

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Winter 1983 G&G; Lab Notes

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

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Spring 1994 Gem News International

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Spring 1994 G&G; Lab Notes

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Winter 1984 Gem News International

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Spring 1996 Gem News International

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Winter 1984 G&G; Lab Notes

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Spring 1997 Gem News International

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

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Spring 1997 G&G; Lab Notes

This section, from the Spring 1997 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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Summer 1991 Gem News International

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

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Winter 2003 Gem News International

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

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Spring 2001 Gem News International

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Spring 2002 Gem News International

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

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