Okenite

phyllosilicate

carbonatite

Formula: Ca10Si18O46.18H2O phyllosilicate
Specific Gravity: 2.28 to 2.33
Hardness: 4½ to 5
Streak: White
Colour: Colourless, white, pale yellow, blue
Environments:

Carbonatites
Basaltic cavities

Okenite occurs in cavities in basalt or related eruptive rocks. In limestone at Crestmore, California, USA, and in carbonatites. It is often associated with zeolites, apophyllite, calcite, prehnite and quartz.
Common impurities: Al,Fe,Sr,Na,K

Back to Minerals