tetrahedrite
/ˌtɛtrəˈhiːdraɪt/
noun
- A gray to black metallic mineral composed of copper, antimony, and sulfur, often found in ore deposits and used as a source of copper.
- Collectors prize well-formed tetrahedrite crystals for their sharp, tetrahedral shapes.
- Tetrahedrite is an important ore of copper in many mining regions.
- The mineral tetrahedrite often occurs with other sulfide minerals like pyrite.