Prehnite 13x16mm Center Drilled Faceted Pear Bead - 15-16 Inch 48hr_03102026 White African Opal is a

White African Opal is a white to cream to light tan stone with veining of black or gray

madre xacao or madre de cacao

Noreena Jasper is a silicified pelite or mudstone mined in the Pilbara region of Western Australia

Boulder Opal is a golden-brown to dark brown stone

Prehnite 13x16mm Center Drilled Faceted Pear Bead - 15-16 Inch 48hr_03102026 White African Opal is aPrehnite 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.