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Man sits next to microscope.
Article
Tucson Visit Spurs Geology Professor and Publisher to Head Back to School

Geologist and publisher earns his GG so he can share more information on gem materials with visitors to Geology.com, his Earth Science website.

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Dalmatian stone samples
True Colours of “Dalmatian Jasper”

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

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

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

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Fall 2016 Gems & Gemology Cover
Article
Autumn 2016 G&G: CVD Synthetic Diamonds Survey, Reversible Colour Change in Blue Zircon

A summary of the content found in the Autumn 2016 issue of Gems & Gemology.

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Minerals of Georgia: Their Properties and Occurrences Book Cover
Book Review: Minerals of Georgia: Their Properties and Occurrences

Review of Minerals of Georgia: Their Properties and Occurrences, 2nd ed. by Robert B. Cook and Julian C. Gray.

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Minerals of Georgia: Their Properties and Occurrences Book Cover
Article
Book Review: Minerals of Georgia: Their Properties and Occurrences

Review of Minerals of Georgia: Their Properties and Occurrences, 2nd ed. by Robert B. Cook and Julian C. Gray.

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

A look at the gemmological 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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Coated lawsonite pseudomorphs coated to resemble chromian lawsonite
Coated Lawsonite Pseudomorphs Presented as Chromian Lawsonite

Samples composed of lawsonite pseudomorphs were coated to make them appear deep green and imitate chromian lawsonite crystals.

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Dr Gaston Giuliani
IMA General Meeting

A summary of gemmological presentations from the 21st IMA General Meeting in Johannesburg.

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IMG - RN BR Minerals New York Tatje 300x169
Books: The Collector's Guide to the Minerals of New York State

Review of The Collector's Guide to the Minerals of New York State

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