featured Research & News

LAB NOTES

Partially Hollow Tridacna Blister Pearls with Shells Attached

Blister pearls attached to shells are seen in both the Bangkok and New York laboratories.
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FEATURED ARTICLE

A ‘Game-Changing’ Quality Assurance System for Jewelry Workmanship

Education teams create a step-by-step system and terms to evaluate jewelry workmanship – in the classroom and the trade.
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LAB NOTES

Melee Diamond Parcel Containing Nearly One-Third CVD Synthetics

GIA Melee Analysis Service reports a significant number of CVD synthetic diamonds in a parcel.
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GEM NEWS INTERNATIONAL

New Deposits of Gem-Quality Common Opal from Michoacán, Mexico

Material from a new opal deposit in Morelia, Mexico is examined.
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Featured Article

Diamond Producers Aim for Lower Qualities in Today’s Market

The average value of rough diamonds mined last year took a sharp drop, while demand has trended toward smaller stones and lower qualities.
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