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.
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.
The Yogo Sapphire Deposit
Yogo Gulch, discovered more than 100 years ago, is one of four major sapphire-producing areas in Montana, United States.
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.
Sapphires from Australia
An overview of Australia's recent significance in the production of blue sapphire.
The Sapphires of Mingxi, Fujian Province, China
Blue sapphires from China are similar to gem corundum from Australia, Thailand, and Kampuchea (Camodia).
The Elahera Gem Field in Central Sri Lanka
The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.
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.
Sapphire from the Mercaderes-Río Mayo Area, Cauca, Colombia
An important source of gem-quality sapphire and its inclusions is found in Colombia.
The Chanthaburi-Trat Gem Field, Thailand
Thailand has become the world's major source of gem ruby.