Tuscanite Field ov view: 3 mm Locality: Mt. Cavalluccio, Sacrofano, Roma, Lazio, Italy — Photo: Henk Smeets – tomeikminerals.com · CC BY 4.0
Tuscanite
Tuscanite is an IMA-recognized mineral species in the silicate class, with the chemical formula KCa₆(Si,Al)₁₀O₂₂(SO₄,CO₃)₂(OH)·H₂O.
It crystallizes in the monoclinic crystal system (space group P2_1/a).
Key properties: Mohs hardness 5.5–6; specific gravity 2.83; optically biaxial.
IMA symbol Tus, IMA status: approved, named in 1976.
Within ejected blocks of metasomatized carbonate rocks in a pumice deposit.
It is found associated with Vesuvianite, andradite, grossular, pyroxene, wollastonite, anorthite, clintonite, latiumite.
The name refers to the Tuscany region of Italy where the mineral was first found.
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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