Tet`ra*he"drite (?), n. [So called because the crystals of the species are commonly tetrahedrons.] Min.

A sulphide of antimony and copper, with small quantities of other metals. It is a very common ore of copper, and some varieties yield a considerable presentage of silver. Called also gray copper ore, fahlore, and panabase.

 

© Webster 1913.

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