euclase

euclase [yoo-kleys, -kleyz] ExamplesWord Origin noun

1. a rare green or blue mineral, beryllium aluminum silicate, BeAlSiO4(OH), occurring in prismatic crystals.

Origin of euclase From French, dating back to 1795–1805; see origin at eu-, -clase Examples from the Web for euclase Historical Examples of euclase

Some other minerals in which it occurs are phenakite, euclase, and chrysoberyl.

A Textbook of Assaying: For the Use of Those Connected with Mines.

Cornelius Beringer and John Jacob Beringer