Spring 2013 - Vol. 49, No. 1
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Musgravite from Myanmar
Musgravite from Myanmar

Two small, near-colorless stones reportedly from Myanmar (0.11 and 0.24 ct; figure 1) were recently loaned to GIA for examination for identification.

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Blue Cat's-Eye Apatite
Blue Cat's-Eye Apatite

Deep blue apatite with a cat’s-eye effect, however, is very rare.

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Karampelas
Gemological Characteristics of Saltwater Cultured Pearls Produced After Xenotransplantation

Spectroscopic and radiographic study of experimental saltwater cultured pearls produced from xenotransplantation between P. margaritifera and P. maxima.

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 Zuowei
A Comparison of Modern and Fossil Ivories Using Multiple Techniques

This article provides identification criteria to distinguish between modern and fossil (mammoth) elephant ivory.

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LI
Infrared Spectroscopic Study of Filled Moonstone

A study on how infrared spectroscopy provides conclusive evidence of impregnated moonstone.ation of impregnated moonstone.

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Shor
Auction Houses: A Powerful Market Influence on Major Diamonds and Colored Gemstones

A report on how high-profile jewelry auctions have affected the gem and jewelry market.

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Petrochemical Characteristics and Genesic Significance of Luodian Jade from Guizhou

Luodian jade is a newly discovered nephrite variety in 2009 at the Luodian county of Guizhou province, China.

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Paramagnetic Hole Centres in Natural Zircon and Zircon Colouration

This article explores atomic defect centers (color centers) of natural zircon from three localities (North Carolina, the Massif Central in the south of France, and the Ural Mountains of Russia).

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The “Glet Filling”: The Filling of the Cracks in Precious Stones Under Scrutiny

This short article discusses several important aspects of crack-filling in colored stones and diamonds.

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Copper-Bearing Minerals of Colorado

The state of Colorado has produced some significant copper-bearing mineral specimens.

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