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Prehnite definitions

Webster's 1828 Dictionary

PREHN'ITE, n. A mineral of the silicious kind, of an apple green or greenish gray color. It has been called shorl, emerald, chrysoprase, felspath, chrysolite, and zeolite. It has some resemblance to zeolite, but differs from it in several particulars, and is therefore considered to be a particular species.
Prehnite is near to stilbite, and is classed by the French with the family of zeolites.
It is massive or crystallized, but the form of its crystals cannot be determined in consequence of their aggregation.

Webster's 1913 Dictionary

Prehnite Prehn"ite, n. [So called from the German Colonel Prehn, who first found it.] (Min.) A pale green mineral occurring in crystalline aggregates having a botryoidal or mammillary structure, and rarely in distinct crystals. It is a hydrous silicate of alumina and lime.




 


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