Add a touch of sophistication to your jewelry collection with this stunning Natural Black Opal Round Shape Cabochon Doublet Gemstone. With a weight of 15.10 carats, this gemstone is an excellent cut grade and has an opaque transparency. The gemstone is polished to perfection and has a black color that adds an element of mystery to the stone. This 16.9mm long and wide gemstone is from Ethiopia and has a slight inclusion clarity grade. The gemstone is a natural creation and has been impregnated for treatment. The gemstone has a beautiful asterism effect that adds to its charm. With certification from ggij, this gemstone is a must-have for any jewelry lover.