Summer 2014 - Volume 50, Issue 2
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In Praise of Hands - The Art of Fine Jewelry at Van Cleef & Arpels
Books: In Praise of Hands: The Art of Fine Jewelry at Van Cleef & Arpels

Review of Franco Cologni’s In Praise of Hands: The Art of Fine Jewelry at Van Cleef & Arpels

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Emeralds from Musakashi, Zambia
Three-Phase Inclusions in Emerald and Their Impact on Origin Determination

Discusses the role of three-phase inclusions in emerald, in combination with spectroscopy and trace-element analysis, in determining geographic origin.

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Botswana’s Scintillating Moment
Botswana’s Scintillating Moment

Examines the history of diamond production in Botswana and the long-term outlook for beneficiation through value-added industries.

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shell pearl necklace, bracelet, earrings
Shell Pearl as a Pearl Imitation

Examination of commercially-available "shell pearls" reveals imitation material.

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Cross jewel of gold, turquoise, other gems
GIA Museum Exhibits in New York

A brief look at GIA's permanent museum exhibit at the New York lab and campus.

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Blue amber beads from the Dominican Republic
Color Phenomena of Blue Amber

Investigates the presence of fluorescence, rather than iridescence, as the cause of color in blue amber from the Dominican Republic and Indonesia.

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Four types of heated Baltic amber
Experimental Studies on the Heat Treatment of Baltic Amber

Amber samples were heat-treated, using various procedures and parameters, in an effort to reproduce materials found in the jewelry market.

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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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A Selection of Faceted Natural Ametrines.
Using Conventional Equipment to Separate Natural from Synthetic Ametrine

A summary of the article “A simple approach to separate natural from synthetic ametrine,” by Francine Payette.

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