Cavansite

[6] Discovered in 1967 in Malheur County, Oregon, cavansite is a relatively rare mineral.It is most frequently found in Pune, India, and in the Deccan Traps, a large igneous province.However, because of its rich color and relative rarity, cavansite is a sought-after collector's mineral.The color is the same as its dimorph, pentagonite, but the latter is generally much more spikey with bladed crystals.Finally, the associated minerals are useful for identification, as cavansite is frequently found sitting atop a matrix of zeolites or apophyllites.
Stalactitic cavansite, 3.6 x 2.1 x 1.8 cm, Wagholi , Pune District , Maharashtra , India
Silicate mineralFormulaIMA symbolCrystal systemOrthorhombicCrystal classH–M SymbolSpace groupCrystal habitCleavageTenacityMohs scaleLusterStreakDiaphaneitySpecific gravityRefractive indexBirefringencePleochroism2V anglecalciumvanadiumphyllosilicatebasalticandesiticzeoliteMalheur CountyOregonpolymorphicpentagoniteDeccan Trapslarge igneous provinceapophyllitestilbitebabingtonitequartzcalciteStalactiticWagholiPune DistrictMaharashtraBibcode