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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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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Yogo Gulch, discovered more than 100 years ago, is one of four major sapphire-producing areas in Montana, United States.
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Gem-quality rubies and pink to purple sapphires are being recovered from the Luc Yen and Quy Chau mining regions of Vietnam.
Read MoreThe Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.
Read MoreBlue sapphires from China are similar to gem corundum from Australia, Thailand, and Kampuchea (Camodia).
Read MoreAn overview of Australia's recent significance in the production of blue sapphire.
Read MoreAn important source of gem-quality sapphire and its inclusions is found in Colombia.
Read MoreThe history of the Kashmir mines, the beautiful sapphires found there and the outlook for the future.
Read MoreThailand has become the world's major source of gem ruby.
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