Prehnite is a phyllosilicate of calcium and aluminim. Prehnite crystallizes in the orthorhombic crystal system, and most oftens forms as stalactitic or botryoidal aggregates, with only just the crests of small crystals showing any faces, which are almost always curved or composite. Very rarely will it form distinct, well individualized crystals showing a square-like cross-section. It is brittle with an uneven fracture and a vitreous to pearly lustre. Its color varies from light green to yellow, but also colorless, blue or white.

Mixed large faced nuggets - Aquamarine, Rose Qtz., and Prehnite. $195.00