Okenite

Okenite

Okenite,  CaSi2O. 5 . 2H2O   is a colourless silicate mineral that is closely associated with zeolites. The cotton wool effect of this mineral is the result of very fine fibrous  radiating crystals. This specimen is from  the Poona district in India, probably from Malad quarry in Mumbai. Deccan lava flows in the late cretaceous period which deposited massive areas of basalt, are the source of this mineral. Also visible on this specimen around the Okenite are what are possibly small globular crystals of Gyrolite.