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Dalmatian stone samples
True Colors of “Dalmatian Jasper”

Discusses the mineralogical composition and provenance of this spotted decorative gemstone.

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Two variscite cabochons from central Tajikistan
Variscite from Central Tajikistan: Preliminary Results

A look at the gemological properties and chemical composition of this light blue to light green to green gem material, which is suitable for cabochon cutting.

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Evan Smith studies images of diamond inclusions on a computer.
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Postdoctoral Program Gives Scientists Access to Rare Research Opportunities

GIA’s postdoctoral program gives researchers access to gemological data, equipment and rare, unusual and large gems in its laboratories.

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Necklaces, pendants, statuette, and slab of serpentine
Gem-Quality Serpentine from Val Malenco, Central Alps, Italy

A detailed characterization of serpentine from this mountain locality, focusing on its use as a gem material.

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