Prehnite 13mm Faceted Clover - 15-16 Inch Stone Type_Botswana Agate It is known for its

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

priests and kings and believed to be a powerful protection stone

It is believed to be a powerful meditation stone

The presence of Manganese within the stone produces the purple hue

Prehnite 13mm Faceted Clover - 15-16 Inch Stone Type_Botswana Agate 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.