Summer 2011

POSTER SESSION: GEM LOCALITIES AND FORMATION

Blue and Pink Sapphires from Muling, Northeastern China
Tao Chen, Mingxing Yang, and Hao Ai

Gem Materials in the South of Brazil
Pedro L. Juchem, Tania Mara M. de Brum, Nelson L. Chodur, and Antonio Liccardo

Ruby from Liberia
Lore Kiefert and Makhmout Douman

Systematic Diamond Descriptions for Use in Geology and Exploration
Julie A. Klettke

Using a Concrete Mixer to Sort Gem-Bearing Gravels for Artisanal and Small-Scale Mining
Rouay Limsuwan and Takehiro Sakimoto

Petrogenesis of the Li-Bearing Stewart Pegmatite, Pala, California
Douglas Morton, Blue Sheppard, Cin-Ty Lee, Dave Kimbrough, Byron Berger, Robert Fleck, Ronald Kistler, William Benzel, Lawrence Snee, and Krishangi Groover

A Study of Ruby on Painite from the Mogok Stone Tract
Andy Nissinboim and George E. Harlow

Gemstones from Mexico—A Review
Mikhail Ostrooumov

The Pederneira Pegmatite, Minas Gerais, Brazil: Geology and Gem Tourmaline
Federico Pezzotta, Ilaria Adamo, Valeria Diella, G. Diego Gatta, and Rosa M. Danisi

Blue “Opal” (or Cristobalite?) from Rio Grande do Sul, Brazil
Jurgen Schnellrath, Hélio S. Amorim, Pedro L. Juchem, Tania Mara M. Brum, and Roberto Salvador D. Miceli

Recent Trends in World Colored Gem Production
Thomas R. Yager

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