Two very small single black crystals of the extremely rare Ag-Pb-Sb sulphosalt mineral roshchinite from the TL in Kazakhstan (Kvartsitovje Gorki, Aksu, Stepnogorsk, Akmola Region, Kazakhstan). Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Roshchinite
Roshchinite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula (Ag,Cu)₁₉Pb₁₀Sb₅₁S₉₆.
It crystallizes in the orthorhombic crystal system (space group Pmna). It is a member of the Lillianite structural group.
IMA symbol Rch, IMA status: approved, named in 1989.
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