Cavansite
Image: <a href="//commons.wikimedia.org/w/index.php?title=User:Parent_G%C3%A9ry&action=edit&redlink=1" class="new" title="User:Parent Géry (page does not exist)">Parent Géry</a> (CC BY-SA 3.0)
Mineral NameCavansite
Chemical FormulaCa(VO)Si4O10·4H2O
Mohs Hardness3
Crystal Systemorthorhombic
Lustervitreous
Streak Colorpale blue
Cleavageperfect on {010}
Fractureuneven
Specific Gravity2.21
Colorsblue, deep blue, bluish green
Transparencytransparent
Type LocalityWagholi Quarry, Wagholi, Pune District, Maharashtra, India
Mineral GroupSilicates
Usescollector
Associated Mineralsstilbite, apophyllite, heulandite, calcite, quartz
Rarityuncommon
Description
This image displays vibrant, deep blue cavansite crystals forming radiating, spherical aggregates on a light-colored matrix. The crystals have a delicate, needle-like appearance, creating a striking visual contrast with the host rock.
Geological Context
Cavansite is a secondary mineral found in basaltic and andesitic rocks, typically occurring in amygdules and veins. It forms during the late-stage hydrothermal alteration of these volcanic rocks, often in association with zeolites.
