is an hydrated Calcium ,Aluminum silicate with formula CaAl2Si6O16 - 5H2O and hardness of
4-4.5.It belong to the great family of zeolite,with an aggregate structure of rosette clusters formed inside vescicle of the basaltic rocks.
Rarely flawless,is semi-trasparent to translucent.Small cavities may be present.
From Wagholi quarry,Puna,India,
Size: 16x9x6.8 mm.
Weight: 3.53 ct.