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Abstract Header from the 2009 issue of Gems & Gemology
Abstracts; Summer 2009

This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

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Ruby and Sapphire from Jegdalek, Afghanistan
Ruby and Sapphire from Jegdalek, Afghanistan

This study provides detailed mining and gemmological information on the Jegdalek deposit, in east-central Afghanistan, which is hosted by elongate beds of corundum-bearing marble.

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The Yogo Sapphire Deposit
The Yogo Sapphire Deposit

Yogo Gulch, discovered more than 100 years ago, is one of four major sapphire-producing areas in Montana, United States.

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Rubies and Fancy Sapphires from Vietnam
Rubies and Fancy Sapphires from Vietnam

Gem-quality rubies and pink to purple sapphires are being recovered from the Luc Yen and Quy Chau mining regions of Vietnam.

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Sapphires from Australia

An overview of Australia's recent significance in the production of blue sapphire.

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The Sapphires of Mingxi, Fujian Province, China

Blue sapphires from China are similar to gem corundum from Australia, Thailand, and Kampuchea (Camodia).

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The Elahera Gem Field in Central Sri Lanka

The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.

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Sapphires from Southern Vietnam
Sapphires from Southern Vietnam

Gem-quality blue to bluish green sapphires from basaltic terrains in southern provinces of Vietnam have been entering the gemstone market since the late 1980s.

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Sapphire from the Mercaderes-Río Mayo Area, Cauca, Colombia

An important source of gem-quality sapphire and its inclusions is found in Colombia.

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The Chanthaburi-Trat Gem Field, Thailand

Thailand has become the world's major source of gem ruby.

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