CavansiteChemistry: Ca(VO)Si4O10(H2O)4, Hydrated Calcium Vanadium Silicate
Class: Silicates
Subclass: Phyllosilicates
Color is greenish-blue to ocean blue.
Luster vitreous to pearly.
Transparency transparent to translucent.
Crystal System: Orthorhombic
Crystal Habits radiating acicular crystals forming spherical crystal clusters.
Cleavage perfect in one direction.
Fracture conchoidal.
Hardness 3 - 4
Specific Gravity is approximately 2.33
Streak is blue.
Associated Minerals include zeolites such as stilbite and heulandite as well as calcite, apophyllite , babingtoniteand quartz.
Other Characteristics: larger crystals show an unusual internal reflection.
Notable Occurrence is Poona, India and Columbia Co. and Malheur Co., Oregon, USA.
Best Field Indicators are color, associations, locality and crystal habit.
Cavansite - India
Immagine:
24,57 KB(C) Chinellato Matteo cubo = 1 cm.
