Crystals of tetrahedrite up to 2.2 cm in size forming a cluster (3.5 × 2.5 × 2.5 cm) with quartz and micro mimetite. Found from Black Pine mine, Granite County, — Photo: Ivar Leidus · CC BY-SA 4.0
Tetrahedrite-(Fe)
Also known as: Gray copper ore, Fahlore.
Tetrahedrite-(Fe) is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Cu₆(Cu₄Fe₂)Sb₄S₁₃.
It is a member of the Tetrahedrite structural group.
Key properties: Mohs hardness 3–4.5; typically gray or black.
IMA symbol Ttr-Fe, IMA status: approved, named in 1863.
Collections: Metals & Native Elements, Collector Favorites.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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