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Mineral mining

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

Contributors in Mineral mining

Mineral mining

Black chalk

Mining; General mining

A bluish-black carbonaceous clay, shale, or slate, used as a pigment or crayon.

Pisanite

Mining; General mining

A blue to green cuproan melanterite (Fe,Cu)SO 4 .7H 2 O .

Blue ironstone

Mining; General mining

A bluish iron-bearing mineral; specif: crocidolite and vivianite.

Siberian aquamarine

Mining; General mining

A blue-green beryl from Siberia, Russia.

Tanzanite

Mining; General mining

A blue to violet gem variety of zoisite.

Indicolite

Mining; General mining

A blue variety of elbaite tourmaline.

Jager

Mining; General mining

A bluish-white diamond of modern cut.

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