Prehnite with Rutilate 8mm Round - 15-16 Inch 12 Enjoy these rare and exotic

Enjoy these rare and exotic stones in their natural form

A mixture of hydrocarbons

this wood variety is so hard that it is often used in heavy construction for beams

they appear dark or black

Prehnite with Rutilate 8mm Round - 15-16 Inch 12 Enjoy these rare and exoticPrehnite 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.