featured Research & News

A male retail jeweler helps a woman look at a diamond through a loupe.
Industry Analysis

Reports Indicate Continued Economic Growth

Holiday jewelry sales in the U.S. increased in 2017, according to a several industry and economic reports. Updates on diamond markets and challenges.
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Sub-hexagonal etch pits in synthetic moissanite.
Lab Note

Synthetic Moissanite Imitating Rough Diamond

A light green specimen, submitted as a rough diamond, is actually a synthetic moissanite.
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Sixteen samples of facet-quality ruby

Preliminary Observations on Facet-Grade Ruby from Tanzania

Microscopic observation and trace element analysis is performed on rubies from Longido.
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Alexandrite cabochon in fluorescent (left) and incandescent light (right).

Cat’s-Eye Alexandrite with Unique Inclusion Pattern

Examination of a chatoyant alexandrite cabochon.
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Circular logo with the words “International GIA Gemological Symposium” around the outside and a star with a diamond center in the center circle.

2018 GIA Symposium

Symposium has revealed the discoveries, opportunities and insights that move businesses forward. Seats are limited. Register today.
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