Explores the emergence of the Luc Yen area as a producer of corundum, spinel, tourmaline and other coloured stones.
Read MorePrimary occurrences of ruby, pink sapphire, sapphires of other colours and spinel have been found in marbles in the Ural Mountains.
Read MoreNorthern Vietnam began producing significant quantities of rubies and fancy sapphires in the late 1980s.
Read MoreThis article, based on two recent visits to Mogok, briefly reviews the mining history and geology of this extraordinary locality, and describes the current status of mining and the methods used to recover rubies and sapphires in the Mogok area.
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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 MoreChina has identified many deposits with significant potential to produce gemstones; various species are discussed.
Read MoreA review of the history of this area, its geology, and the mining methods that have predominated.
Read MoreThailand has become the world's major source of gem ruby.
Read MoreAn overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
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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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