Emily Dickinson Lexicon

PREHN'ITE, n. [from Prehn, the name of the person who first brought this stone from the Cape of Good Hope.]

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 therefore considered to be a particular species. – Kirwan. Phrenite is near to stilbite, and is classed by the French with the family of zeolites. It is massive or crystalized, but the form of its crystals can not be determined in consequence of their aggegation. – Cleaveland.