This product is a natural Australia Koroit Boulder Opal stone with a blue/green color and opalescence effect. The stone is opaque and has a freeform shape, measuring 13mm in length, 8mm in width, and 5mm in depth. It is a single piece and has not been enhanced or treated. This wholesale gemstone is polished and originates from Australia, making it a unique and beautiful addition to any jewelry or gemstone collection.