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Spring 1992, Volume 28, Issue 1

EDITORIAL

The Gems & Gemology Most Valuable Article Award p.1-p.2

FEATURE ARTICLES

Gem-Quality Green Zoisite p.4-p.15
N.R. Barot and Edward W. Boehm
Kilbourne Hole Peridot p.16-p.27
John R. Fuhrbach

NOTES AND NEW TECHNIQUES

Opal from Querétaro, Mexico: Fluid Inclusion Study p.28-p.34
Ronald J. Spencer, Alfred A. Levinson, and John I. Koivula
Natural-Color Nonconductive Gray-to-Blue Diamonds p.35-p.42
Emmanuel Fritsch and Kenneth Scarratt
Peridot as an Interplanetary Gemstone p.43-p.51
John Sinkankas, John I. Koivula, and Gerhard Becker

REGULAR FEATURES

Gem Trade Lab Notes p.52-p.57
Gem News p.58-p.67

GEMS & GEMOLOGY CHALLENGE

Gems & Gemology Challenge p.68-p.69

REGULAR FEATURES

Gems & Gemology Challenge p.68-p.69
Book Reviews p.70-p.71

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