
Okenite (CaSi2O5·2H2O) is a silicate mineral that is usually associated with zeolites. It most commonly is found as small white `cotton ball` formations within basalt geodes. These formations are clusters of straight, radiating, fibrous crystals that are both bendable and fragile. ==Discovery and occurrence== It was first described in 1828 for .....
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http://en.wikipedia.org/wiki/Okenite

• (n.) A massive and fibrous mineral of a whitish color, chiefly hydrous silicate of lime.
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http://thinkexist.com/dictionary/meaning/okenite/
O'ken·ite noun [ Prob. from Lorenz
Oken , a German naturalist.]
(Min.) A massive and fibrous mineral of a whitish color, chiefly hydrous silicate of lime.
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http://www.encyclo.co.uk/webster/O/15
(Hydrated Calcium Silicate Hydroxide) Okenite is an unusual mineral. It frequently forms `cottonball` clusters where the crystals are so thin they look like tiny fibers. The clusters are composed of straight, radiating, thread thin, crystals. These clusters can make for very attractive specimens and often accompany many fine ...
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https://www.encyclo.co.uk/local/23719
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