Tennantite (Size: 2.6 x 1.6 cm) Locality: Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department, Peru Original description: A cute 2.6 by — Photo: John Sobolewski (JSS) · CC BY 3.0
Tennantite
A copper-arsenic sulfosalt — the arsenic partner of tetrahedrite — a common 'gray copper' ore.
Intro adapted from Wikipedia (CC BY-SA).
Tennantite is a mineral group, with the chemical formula (Cu,Fe)₁₂As₄S₁₃.
It crystallizes in the cubic crystal system.
Key properties: Mohs hardness 3–4.5; typically gray or black.
Collections: Metals & Native Elements, Collector Favorites.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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