Mineral mining

Mineral mining

The extraction of valuable minerals or other geological materials from the earth for economic interests.

Industry: Mining

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Mineral mining

praseodymium oxide

Mining; General mining

A rare earth that, together with zirconia and silica, produces a distinctive and stable yellow color for pottery decoration.

adamite

Mining; General mining

A rare hydrous zinc arsenate, Zn 2 (AsO 4 )(OH) , occurring granular or in crusts and crystallizing in the orthorhombic system. Weakly radioactive; variable color--yellowish, greenish, or violet, ...

noble gas

Mining; General mining

A rare inert gas: helium, neon, argon, krypton, xenon, and radon.

inert gas

Mining; General mining

A rare inert gas: helium, neon, argon, krypton, xenon, and radon.

celsian

Mining; General mining

A rare monoclinic mineral, BaAl 2 Si 2 O 8 ; feldspar group; the barium analog of anorthite; dimorphous with paracelsian.

thoria

Mining; General mining

A rare refractory oxide, ThO 2 .

combined twinning

Mining; General mining

A rare type of twinning in quartz in which there appears to be a 180 degrees rotation around c with reflection over (1120) or over (0001). The crystal axes are parallel, but the polarity of the a ...