Summer 2011

RESEARCH TRACK: GEM LOCALITIES AND FORMATION

The Fundamentals in Mining for Colored Gemstones and Mineral Specimens
Jim J. Clanin

The Making of a Diamond Mine: Why Everyone Cannot Have One
Howard G. Coopersmith

State of the Art in the Formation of High-Value Colored Stones
Gaston Giuliani, Daniel Ohnenstetter, Anthony E. Fallick, and Julien Feneyrol

Mystery Diamonds—From Alluvial Deposits
Bram Janse

Geology, Exploration, Mining, and Processing of Gems and Gold from Placer Deposits on the Muhuwesi River, Tunduru, Tanzania
Rouay Limsuwan and Takehiro Sakimoto

Gem Pockets in Pegmatites—A Worldwide Study and Comparison
Peter Lyckberg

Amazing Play-of-Color Opals from Wollo, Ethiopia—Toward a Genetic Model
Benjamin Rondeau, Emmanuel Fritsch, Francesco Mazzero, Dereje Ayalew, and Yves Bodeur

Diamonds and Cratons—Does the Relationship Hold for the Canadian Deposits?
Thomas Stachel

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