Mother of Pearl 6mm White Heishi Bead - 15-16 Inch 20210817 5 billion years ago

5 billion years ago

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

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

such as China

They represent transition

Mother of Pearl 6mm White Heishi Bead - 15-16 Inch 20210817 5 billion years agoMother 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.