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Tetrahedrite
Tetrahedrite is a gray to black copper antimony sulfide mineral valued as an ore of copper and silver, easily identified by its tetrahedral crystal form. It belongs to the sulfide mineral group and is commonly found in hydrothermal veins. Spiritually, it is often associated with truth-seaking, willpower, and self-expression. Chemically, its general formula is (Cu,Fe)₁₂Sb₄S₁₃.
