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

Ness

Mining; General mining

A British term used esp. in Scotland for a promontory, headland, or cape, or any point or projection of the land into the sea; commonly used as a suffix to a place name, e.g., Fifeness.

Split brilliant

Mining; General mining

A brilliant split apart at the base of its pyramidal forms, so as to make two gems.

Arkansite

Mining; General mining

A brilliant, iron-black variety of brookite from Magnet Cove, AR.

Felspar

Mining; General mining

A British spelling of feldspar following an error by Kirwan.

A broad, gently sloping rock-floored erosion surface or plain of low relief, typically developed by running water in an arid or semiarid region at the base of an abrupt and receding mountain front or ...

Umber

Mining; General mining

A brown earth that is darker than ocher and sienna, consisting of iron oxide and oxyhydroxide with manganese oxides, clay, and lime. Highly valued as a permanent pigment, it may be used in its ...