This product is a pair of natural spiny oyster turquoise cabochon gemstones, each weighing 16.00 carats. The gemstones are opaque, have a beautiful blue color, and are in excellent cut grade. They display unique gemstone effects such as color change, aventurescence, iridescence, and asterism. These handmade, polished gemstones are eye clean and originate from South Africa. The item length is 21mm, width is 12mm, and depth is 3mm. Ideal for jewelry and watch making, these natural turquoise stones add a touch of elegance and charm to any piece.