Mining Engineering


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The estimated value of natural gemstones produced from U.S. deposits during 2011 was $10.6 million, a 6-percent increase from 2010. U.S. gemstone production included agate, amber, beryl, coral, garnet, jade, jasper, opal, pearl, quartz, sapphire, shell, topaz, tourmaline, turquoise and many other gem materials.
Publication type Article
Publication Subtype Journal Article
Title Gemstones
Series title Mining Engineering
Volume 64
Issue 6
Year Published 2012
Language English
Publisher SME
Contributing office(s) National Minerals Information Center
Description 2 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Mining Engineering
First page 54
Last page 55
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