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United States Bureau of Mines
Industry: 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 ...
Having a microscopic granitoid structure.
Industry:Mining
Having a rough, catchy surface.
Industry:Mining
Having a single distinct diagonal cleavage; applied to certain crystals.
Industry:Mining
Having a small positive magnetic susceptibility. A paramagnetic mineral such as olivine, pyroxene, or biotite contains magnetic ions that tend to align along an applied magnetic field but do not have a spontaneous magnetic order. Compare: diamagnetic
Industry:Mining
Having a small, negative magnetic susceptibility. All materials that do not show paramagnetism or magnetic order are diamagnetic. Typical diamagnetic minerals are quartz and feldspar. Compare: paramagnetic
Industry:Mining
Having a straight back-and-forth or up-and-down motion.
Industry:Mining
Having a texture consisting of numerous small grains; said of minerals.
Industry:Mining
Having an imperfect fracture or cleavage.
Industry:Mining
Having an oblique spiral arrangement of faces; specif., being a group of the isometric system characterized by 13 axes of symmetry but no center or planes. Also spelled plagihedral.
Industry:Mining
Having analogous composition and closely similar crystal structure, but not capable of intercrystallizing to form solid solutions. Examples are calcite and soda niter; galena and NaBr. Compare: isomorphous
Industry:Mining