An introduction to Moroccan amethyst, which features distinctive color zoning and inclusions.
Read MoreThere have been a number of changes in Ammolite production from southern Alberta, Canada, since 2001.
Read MoreThe 1990s saw growth in gem exploration, production and marketing worldwide.
Read MoreThis article chronicles the discovery of primary diamond deposits throughout Canada, whose increasing supply of rough stones will have a growing impact on the world diamond industry.
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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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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.
Read MoreFor more than a century, the Four Peaks mine in Maricopa County, Arizona, has produced gem-quality amethyst.
Read MoreLapis lazuli has been mined from the Coquimbo Region of Chile since 1905.
Read MoreNew mining techniques have combined state-of-the-art equipment and technology to detect and extract large, fine-quality rhodochrosite specimens and gem rough.
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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