Prehnite 6mm Coin Faceted A Grade - 15-16 Inch Multi Ruby Zoisite occurs naturally when

Ruby Zoisite occurs naturally when small Ruby crystals become embedded within Zoisite

Quartz has been highly valued by virtually every civilization throughout history

Viking explorers used thin pieces of Iolite as the world’s first polarizing lens to help them determine the exact location of the sun for navigation

Tanzanite is both extremely rare and extremely attractive

Prehnite 6mm Coin Faceted A Grade - 15-16 Inch Multi Ruby Zoisite occurs naturally whenPrehnite 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.