Santaclaraite Locality: Mount Hamilton, Diablo Range, Santa Clara Co., California, USA Pink Santaclaraite. Field of view 20 mm. Specimen and photo Leon Hupperichs. — Photo: Leon Hupperichs · CC BY-SA 3.0
Santaclaraite
Santaclaraite is an IMA-recognized mineral species in the silicate class, with the chemical formula CaMn²⁺₄Si₅O₁₄(OH)₂·H₂O.
It crystallizes in the triclinic crystal system (space group I-1).
Key properties: Mohs hardness 6.5; specific gravity 3.31; Pale pink streak; Vitreous luster; optically biaxial.
IMA symbol Scl, IMA status: approved, named in 1979.
Occurs as cross-fiber veins and irregular masses in manganese-oxide-stained chert and quartz.
It is found associated with Calcite, quartz, barite, harmotome, chalcopyrite, copper, howieite, kutnohorite, rhodochrosite, braunite.
The name refers to the occurrence in Santa Clara Co., California, USA.