Prehnite 13mm Faceted Clover - 15-16 Inch tool set Unlike many other turquoise varieties

Unlike many other turquoise varieties

igneous rock with high silica content

ochre browns and deep greens

Hematite is an iron oxide and one of the few gemstones with a metallic luster

Prehnite 13mm Faceted Clover - 15-16 Inch tool set Unlike many other turquoise varietiesPrehnite 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.