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

Soot

Mining; General mining

A black substance, consisting essentially of carbon from the smoke of wood or coal, esp. that which adheres to the inside of the chimney, containing also volatile products condensed from the ...

Specular hematite

Mining; General mining

A black or grey variety of hematite with splendant metallic luster, often showing iridescence; occurs in micaceous or foliated masses or in tabular or disklike crystals.

Grey hematite

Mining; General mining

A black or grey variety of hematite with splendant metallic luster, often showing iridescence; occurs in micaceous or foliated masses or in tabular or disklike crystals.