|Crystal class||Prismatic (2/m)
(same H-M symbol)
Nobleite is a rare borate mineral with the chemical formula CaB6O9(OH)2·3H2O. It was discovered in 1961, in Death Valley, California, and is named for Levi F. Noble, a USGS geologist, in honor of his contributions to the geology of the Death Valley region.
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