Cavansite

Formula: Ca(VO)Si₄O₁₀·4H₂O
Mineral class: silicates
Crystal system: orthorhombic
Mohs scale: 3 - 4
Density (g/cm³): 2.21 - 2.31
Refractive index: 1.542 - 1.551
Cleavage: good
Colors: blue
Transparency: transparent
Luster: vitreous
Fluorescence: -
Pleochroism: X: colorless, Y: blue, Z: colorless
Largest crystal: 2 cm?
Deposits: Brazil, India, New Zealand, USA
Discovery: 1967
1st Description: 1973 (Evans, Lindsay, Staples)
Name: from its chemical composition: calcium, vanadium, silicate

Cavansite Mineral on Stilbite

Size: 4.0 x 2.8 x 2.6 cm
Size of the Cavansite Ball: 1.4 cm
Origin: Poonah Distr. / Maharashtra / India

Photo by kind permission of © www.irocks.com

Cavansit

Weight: 5.30 ct

Origin: Poonah Distr. / Maharashtra / India

Photo by kind permission of © http://lucianabarbosa.com

Cavansite Mineral on Stilbite

Size: 3.5 x 3.5 x 2.5 cm
Length of the Cavansite crystals: max. 2 cm
Origin: Wagholi Quarry / Poonah Distr. / Maharashtra / India

Photo by kind permission of © www.irocks.com

Cavansite

Size: 1.33 x 1.15 x 0.62 cm
Weight: 4.28 ct
Origin: Wagholi Quarry / Poonah Distr. / Maharashtra / India

Photo by kind permission of © www.freakingcat.com