Clinoptilolite Subgroup, Quartz, Calcite Dimensions: 58 mm × 47 mm × 37 mm Locality: Kanan Road Quarry, Agoura Hills, Los Angeles County, California, USA Descri — Photo: Kelly Nash · CC BY 3.0
Clinoptilolite-Ca
Also known as: Clinoptilolite.
Clinoptilolite-Ca is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₃(Si₃₀Al₆)O₇₂·20H₂O.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Heulandite structural group.
Key properties: Mohs hardness 3.5–4; typically white or colorless or pink; white streak; vitreous luster.
IMA symbol Cpt-Ca, IMA status: approved, named in 1997.
Collections: 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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