Formula: Ca(V4+O)(Si4O10).4H2O phyllosilicate (sheet silicate)
Specific gravity: 2.21 to 2.31
Hardness: 3 to 4
Streak: Bluish white
Colour: Blue to greenish blue
Solubility: Slightly soluble in acids
Volcanic igneous environments
Cavansite occurs in zeolites in basalt, and also in Tuff. At Lake Owyhee State Park cavansite occurs in fractures in tuff, associated with zeolites and calcite. Near Pua, India, it occurs in silica-rich breccia.