Is a beautiful small mineral with formula: Ca(VO)Si4O10(H2O)4 , a Hydrated Calcium Vanadium Silicate .
The hardness is 3-4 and rarely found in facet gems due to his difficulty in cutting and polishing. Crystal aggregates consist of spherical rosettes with pointed crystals.
It comes from Poona district ,India; a famous zeolites locality .
Impossible to have clean stones, always translucent with small cavities.
A collector stone!
Size: 8x8x5.5 mm.
Weight: 1.80 ct.