Prehnite

Prehnite is a calcium aluminum silicate mineral that crystallizes in the form of masses, globular formations, botryoidal, and stalactites. Rarely is Prehnite seen in crystal form, but when it is they are usually very tiny prismatic crystals. Prehnite’s color is usually light yellow or green, but can also be seen as white, tan, grey, or colorless. This mineral was first discovered in 1788 by A. G.

Werner. Werner named it after the Dutch military Colonel Hendrik Von Prehn who was in charge of the region where this mineral was found. Since then, Prehnite has been found in China, Scotland, Australia, the United States, and New Zealand. In 2000, an extremely rare pocket of orange Prehnite was discovered in the N'chwaning mine in South Africa. By 2002, the vein was completely exhausted and orange Prehnite has yet to be found again.