The color of cavansite is distinctive, almost always a rich, bright blue. Rarely, cavansite forms bowtie-shaped aggregates. Sometimes the balls are coarse enough to allow the individual crystals to be seen. It tends to form crystal aggregates, generally in the form of balls, up to a couple centimeters in size. Notes for identification Stalactitic cavansite, 3.6 x 2.1 x 1.8 cm, Wagholi, Pune District, Maharashtra, IndiaĬavansite is a distinctive mineral. Members of the zeolite group, particularly stilbite.However, because of its rich color and relative rarity, cavansite is a sought-after collector's mineral. It is most frequently found in Pune, India and in the Deccan Traps, a large igneous province.Īlthough cavansite contains vanadium, and could thus be a possible ore source for the element, it is not generally considered an ore mineral. It is polymorphic with the even rarer mineral, pentagonite. Discovered in 1967 in Malheur County, Oregon, cavansite is a relatively rare mineral. It's blue coloring comes from vanadium, a metal ion. N α = 1.542(2) n β = 1.544(2) n γ = 1.551(2)Ĭavansite, whose name is derived from its chemical composition, calcium vanadium silica te, is a deep blue hydrous calcium vanadium phyllosilicate mineral, occurring as a secondary mineral in basaltic and andesitic rocks along with a variety of zeolite minerals.

Radiating acicular prismatic crystals commonly as spherulitic rosettes

Cavansite olx.ua