Spring 2011

Gem News International

2011 Tucson
COLORED STONES AND ORGANIC MATERIALS
Faceted Cavansite
New Find of Green Grossular at Merelani, Tanzania
Blue Quartz Colored by Trolleite and Lazulite Inclusions
Spectral Interference in Quartz from India
Scapolite from India
Spinel from Northern Vietnam, Including a New Mine at Lang Chap
Gem Zektzerite

SYNTHETICS AND SIMULANTS
“Coral Sea” Agate
Dendritic Agate in Doublets, Inlays, and Jewelry

GNI Regular Features

DIAMONDS
Artisanal Diamond Mining in Liberia

COLORED STONES AND ORGANIC MATERIALS
Update on Emerald Mining at Kagem, Zambia
Pargasite from Tanzania
Scapolite from Afghanistan
Tourmaline Finds at Mt. Marie, Paris, Maine
The Origin of Color in Tourmaline from Mt. Marie, Maine

SYNTHETICS AND SIMULANTS
Trapiche Emerald Imitation
A New Rough Nephrite Imitation
A Skillfully Crafted Non-Nacreous Pearl Imitation
Plastic-Coated Quartz, Imitating Emerald

TREATMENTS
Lead Glass–Filled Trapiche Ruby

MISCELLANEOUS
Myanmar Gem Emporium

ERRATUM

IN MEMORIAM
Kurt Nassau (1927–2010)

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