Mother of Pearl 6mm White Heishi Bead - 15-16 Inch 20210817 Some specimens of Fire Opal

Some specimens of Fire Opal produce iridescent flashes and are referred to as Precious Fire Opal or “Firmament Stone

near the Kennedy Ranges of Australia

but Sonoran Mountain is unique because it is often found in clay deposits as nuggets

5 billion years ago

Mother of Pearl 6mm White Heishi Bead - 15-16 Inch 20210817 Some specimens of Fire OpalMother of Pearl, also known as Nacre, is an iridescent composite of organic and inorganic material most known for being the coating of pearls. It is produced by certain molluscs as an inner shell layer, and forms around pieces of sand or other irritations within such a molluscs shell to create pearls. Mother of Pearl is white with an iridescent sheen.