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Search Results - Gemstones, June 2006
your search of 'Gemstones, June 2006' has 1 result.
12/09/2009
Jet is an organic gemstone consisting mainly of carbon that is often considered a variety of coal. While the gem is mostly black or dark brown in colour, some specimens with pyrite inclusions can exhibit a metallic lustre. Hues can vary but ultimately jet is known for its midnight black appearance - hence the expression “jet black”.
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