featured Research & News

Industry Analysis

Pressure Points of Slow Diamond Market

Soft conditions are making their way into miners’ bottom line. Plus: China and Japan reports.
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Research News

Mozambique Ruby: Low-Temp Heat Treatment

Lab uses inclusion analysis, FTIR spectroscopy and LA-ICP-MS to report changes of Mozambique ruby.
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Research News

New Cobalt Diffusion Treatment of Spinel

The GIA Lab examines unusual-looking, strongly colored blue spinels; reports on a new treatment.
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Tucson 2015

Large Gem Rainbow Discs

Brian Cook’s “wheels of light” reflect the optical effects of gems encased in clear quartz.
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Gem News International

Iridescent
Inclusions in Scapolite

GIA’s Carlsbad lab recently examined two that exhibited prominent iridescence in reflected light.
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