Prehnite 3mm Round Faceted A Grade - 15-16 Inch Tan Tourmaline occurs in nearly every

Tourmaline occurs in nearly every color in the rainbow and its name derives from “turmali

This semi-translucent stone occurs in an array of hues

It was used in the Egyptian Book of the Dead

These inclusions are chromite

Prehnite 3mm Round Faceted A Grade - 15-16 Inch Tan Tourmaline occurs in nearly everyPrehnite 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.