Prehnite with Rutilate 8mm Round - 15-16 Inch 12 are more special than most

are more special than most

It is known for its colors -- dark green and mustardy yellow

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

they appear dark or black

Prehnite with Rutilate 8mm Round - 15-16 Inch 12 are more special than mostPrehnite 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.