Prehnite with Rutilate 8mm Round - 15-16 Inch R0083 It is named for the

It is named for the Amazon River in Brazil

Silica-rich waters create hardened deposits that preserve coral skeletons

The stone was discovered in 2009 by a man in Mexico as a man chasing his goat up a mountain caught sight of an unusual rock

naturally occurring mineral composed of pure carbon

Prehnite with Rutilate 8mm Round - 15-16 Inch R0083 It is named for thePrehnite was the first mineral to be named after a person: its discoverer, Dutch Colonel Hendrik Von Prehn. Von Prehn discovered the stone in South Africa in 1774. Prehnite is translucent to transparent, in colors from light green to yellow green to olive, with occasional inclusions of Black Tourmaline that crisscross the stone in fibrous patterns. It is a phyllosilicate composed of silicon, calcium and aluminum with trace amounts of iron.