Prehnite Natural 6-7mm Table Cut Cube A Grade - 15-16 Inch rounds_part_four It is known for its

It is known for its abstract designs in rusty red

that were deposited in shallow sea beds

Blood Quartz is a clear to milky-white silicon dioxide mineral

This stone is composed of angular fragments of minerals

Zoisite occurs as prismatic

Prehnite Natural 6-7mm Table Cut Cube A Grade - 15-16 Inch rounds_part_four It is known for itsPrehnite 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.