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Spring 2000, Volume 36, Issue 1

EDITORIAL

Breakthrough Technology p.1
William E. Boyajian

FEATURE ARTICLES

Burmese Jade: The Inscrutable Gem p.2-p.26
Richard W. Hughes, Olivier Galibert, George Bosshart, Fred Ward, Thet Oo, Mark Smith, Tay Thye Sun, and George E. Harlow
Lapis Lazuli from the Coquimbo Region, Chile p.28-p.41
Robert R. Coenraads and Claudio Canut de Bon

NOTES AND NEW TECHNIQUES

Spectroscopic Evidence of GE POL HPHT-Treated Natural Type IIa Diamonds p.42-p.49
David Fisher and Raymond A. Spits
Purple to Purplish Red Chromium-Bearing Taaffeites p.50-p.59
Karl Schmetzer, Lore Kiefert, and Heinz-Jürgen Bernhardt

REGULAR FEATURES

Gem Trade Lab Notes p.60-p.65
Lab Notes highlight: Massive Pink HYDROGROSSULAR Carving p.63-p.64
Karin Hurwit
Gem News p.66-p.78
Gem News highlight: An update on ruby and sapphire from Chimwadzulu Hill, Malawi p.71-p.73
The Dr. Edward J. Gübelin Most Valuable Article Award p.79-p.80
Book Reviews p.83-p.84
Gemological Abstracts p.85-p.92

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