- المجال: 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 variety of native gold containing mercury and silver, with gold averaging approx. 40%, commonly associated with platinum in yellowish-white grains that crumble easily. Compare: amalgam
Industry:Mining
A variety of natural asphalt occurring in the Uinta Valley, Utah, as rounded masses of brilliant black solid hydrocarbon.
Industry:Mining
A variety of natural asphalt occurring in the Uinta Valley, Utah, as rounded masses of brilliant black solid hydrocarbon.
Industry:Mining
A variety of natural asphalt occurring in the Uinta Valley, Utah, as rounded masses of brilliant black solid hydrocarbon.
Industry:Mining
A variety of novaculite found in the Ouachita Mountains of western Arkansas. Also, a whetstone made of Arkansas stone.
Industry:Mining
A variety of opal having an apple-green fluorescence reputedly caused by the presence of minute amounts of uranium.
Industry:Mining