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United States Bureau of Mines
行业: Mining
Number of terms: 33118
Number of blossaries: 0
Company Profile:
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 dark-green rock composed essentially of serpentine (hydrous magnesium silicate) usually crisscrossed with white veinlets of marble. Found in California, Georgia, Maryland, Massachusetts, New York, and Virginia. Used as an ornamental stone. In commerce, it is often classed as a marble.
Industry:Mining
A dark-green to nearly black variety of gahnite.
Industry:Mining
A dark-green variety of diopside containing iron; found near Lake Baikal, Russia.
Industry:Mining
A dark-green, brown, or black variety of spinel containing iron.
Industry:Mining
A dark-green, brown, or black variety of spinel containing iron.
Industry:Mining
A dark-green, brown, or black variety of spinel containing iron.
Industry:Mining
A dark-green, brown, or black variety of spinel containing iron.
Industry:Mining
A dark-green, brown, or black variety of spinel containing iron.
Industry:Mining
A dark-violet to black semiopaque variety of fluorite that emits a strong odor when crushed; commonly causing nausea among miners, perhaps owing to free fluorine; produced by alpha bombardment, as in the inner bands of halos surrounding uraninite and thorite inclusions.
Industry:Mining
A Davy lamp placed inside a tin can or cylinder having a glass in front, airholes near the bottom, and an open top.
Industry:Mining
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