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Min Eng 1992 Jun; 44(6):560
In 1991, the value of natural gemstones, fresh water pearls, salt water pearls, coral, and synthetic and simulant gemstones from deposits in the United States was $128.2 million, according to the U.S. Bureau of Mines. The value of natural gem material produced was $109 million, an increase of 106 pct compared to 1990. The value of synthetic and simulant production was $19.2 million, essentially unchanged from 1990. U.S. production accounted for about 2 pct of the $2.9 billion of estimated U.S. consumption of gems and gemstones.
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Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division