Phyllosilicate (sheet silicate)
Specific Gravity: 2.28 to 2.33
Hardness: 4½ to 5
Colour: Colourless, white, pale yellow, blue
Common impurities: Al,Fe,Sr,Na,K
Okenite is a secondary mineral derived from the alteration of basalt (Webmin).
It occurs in cavities in
basalt or related eruptive rocks. In
limestone at Crestmore, California, USA, and in carbonatites. It is
often associated with
prehnite and quartz
The type locality is Qutdligssat, Disko Island, Qeqertalik, Greenland, Denmark.
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