Prehnite 4mm Coin Faceted A Grade - 15-16 Inch Xinjiang Turquoise is known for it's

Turquoise is known for it's strength and protection attributes - dating back to ancient Egyptian amulets

Each stone is unique in terms of its patterns

Fossil Coral is the prehistoric fossilized remains of the invertebrate reef builders that live in tropical oceans

creating veins and mottling that ranges in color from rust to black

Prehnite 4mm Coin Faceted A Grade - 15-16 Inch Xinjiang Turquoise is known for it'sPrehnite 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.