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Richard T. Liddicoat (1918–2002)

A look at the "Father of Modern Gemology," GIA's Richard T. Liddicoat

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Confusing, Triangular Inclusions in an Art Deco-Style Pin
Spring 1991 G&G Lab Notes

This section, from the Spring 1991 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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Chameleon diamond before and after heating
Chameleon Diamond with Nickel Absorption Band

A rare chameleon diamond is examined in GIA's Carlsbad lab.

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Fancy yellow 0.40 ct type Ib CVD-grown synthetic diamond
Yellow CVD Synthetic Diamond

A Fancy yellow type Ib CVD-grown synthetic diamond undergoes testing at the New York lab.

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Short-wave UV exposure’s effect on zircon color
Tenebrescent Zircon

Color modification is observed in a reddish orange zircon at the Bangkok laboratory.

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Faceted wurtzite
Rare Faceted Wurtzite

A stone submitted for identification is revealed to be the first wurtzite examined by the GIA lab.

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Zig-zag growth in synthetic ruby
Flux-Grown Synthetic Ruby with Hydrothermal Synthetic Seed Crystal

An unusual synthetic ruby, combining a hydrothermal ruby seed and flux ruby overgrowth, is examined at the Carlsbad lab.

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Article
D. Vincent Manson (1936–1999)

A gemologist, educator, and self-described dreamer who established the Institute’s research department and founded the world-renowned International Gemological Symposium.

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Article
Charles "Chuck" Fryer (1928–2003)

World-renowned gem identification expert who guided GIA's lab services to the forefront of gemological research.

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Article
Robert Shipley Jr. (1912–1982)

The son of GIA's founder, Robert Shipley Jr. made significant breakthroughs in gem instrumentation.

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