- 行业: Mining
- Number of terms: 33118
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The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A trigonal mineral, Be<sub>2</sub>SiO<sub>4</sub>; colorless to yellow, red, or brown; a minor gemstone sparsely found in granite pegmatites. It is sometimes confused with quartz. Not to be confused with fenaksite.
Industry:Mining
A trigonal mineral, Be<sub>2</sub>SiO<sub>4</sub>; colorless to yellow, red, or brown; a minor gemstone sparsely found in granite pegmatites. It is sometimes confused with quartz. Not to be confused with fenaksite.
Industry:Mining
A trigonal mineral, Bi<sub>2</sub>(Se,S)<sub>3</sub>; paramorphous after orthorhombic guanajuatite.
Industry:Mining
A trigonal mineral, Bi<sub>2</sub>Te<sub>3</sub>; tetradymite group; forms a series with tellurantimony.
Industry:Mining
A trigonal mineral, Bi<sub>4</sub>(S,Se)<sub>3</sub>; the selenium-rich analog of laitakarite, similar to jose#1.ite but containing no tellurium; at the Ikuno Mine, Hyogo Prefecture, Japan.
Industry:Mining
A trigonal mineral, Bi<sub>4</sub>TeS<sub>2</sub>; sp gr, 7.9; at San Jose, Minas Gerais, Brazil. A related mineral, jose#1.ite-B, contains more tellurium and less sulfur.
Industry:Mining
A trigonal mineral, Ca<sub>9</sub>(Mg,Fe)H(PO<sub>4</sub>)<sub>7</sub>; colorless; forms rhombohedra; at North Groton, NH.
Industry:Mining
A trigonal mineral, Ca<sub>9</sub>(Mg,Fe)H(PO<sub>4</sub>)<sub>7</sub>; colorless; forms rhombohedra; at North Groton, NH.
Industry:Mining