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Sapphires from Thammannawa, Kataragama Area, Sri Lanka
Sapphires from Thammannawa, Kataragama Area, Sri Lanka

The February 2012 discovery of high-quality blue sapphires at Thammannawa near Kataragama in south-eastern Sri Lanka has intensified gem mining and exploration in the surrounding area and all over the country.

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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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Status of Ruby and Sapphire Mining in the Mogok Stone Tract

This 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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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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A Survey of the Gemstone Resources of China

China has identified many deposits with significant potential to produce gemstones; various species are discussed.

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Heat Treating the Sapphires of Rock Creek, Montana

Renewed interest in large-scale commercial mining of Montana sapphires motivated a detailed study of the heat treatment of sapphire from the Rock Creek deposit.

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Sapphires from Australia

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

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Update on gemstone mining in Luc Yen, Vietnam

Explores the emergence of the Luc Yen area as a producer of corundum, spinel, tourmaline and other coloured stones.

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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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Sri Lanka: Expedition to the Island of Jewels
Sri Lanka: Expedition to the Island of Jewels

Offers a first-hand look at Sri Lanka’s mining, cutting, jewellery manufacturing and retail sectors, where tradition and innovation converge.

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