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Blasthole

A drill hole filled with explosive charge and detonated

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Blast furnace

A vessel where raw ore and fuels are enriched with compressed air to increase reaction

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Blaster

An employee or contractor responsible for the proper use and care of explosives

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Black smoker

Suboceanic volcanic vent causing the formation of hydrothermal fluids deposit as sulphide on the seafloor

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Bit

The endpiece of a drill closest to its target, alloyed with hard minerals at the point of contac

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Bismuth

A pinkish white, brittle, crystalline metal. Symbol, Bi

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Biotite

A dark, platy monoclinic mica with perfect cleavage K2Mg6(Si6Al2O20)(OH,F)2