This product is a 17.75 CT natural Ethiopian opal rough stone with play of color. The opal rough is transparent and has a vintage, handmade quality to it, making it a unique and authentic gemstone for jewelry and watchmaking. Sourced from Ethiopia, the stone is of excellent cut grade and has not been enhanced, with a gemstone creation that is natural and eye clean. The opal rough measures 16x18x13 mm and is a single piece, perfect for creating stunning and one-of-a-kind pieces of jewelry.