- Industry: 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 ...
Quartz displaying the form and habit of any of several mineral species, which it has assumed through replacement. The most common quartz pseudomorphs are those of calcite, barite, fluorite, and siderite. Silicified wood is quartz pseudomorphous after wood.
Industry:Mining
Quartz having whitish or colored radiations within the crystals. See: star quartz
Industry:Mining
Quartz thickly penetrated with hairlike crystals of rutile, actinolite, or some other mineral. Compare: hedgehog stone
Industry:Mining
Quench hardening in which the heat is generated by electrical induction.
Industry:Mining
Radiation, such as from an antenna of r-f energy into space or of sound energy into a conducting medium.
Industry:Mining