This was the most valuable Persian Turquoise Cabochon we got in the collection when we purchase them over 25 years ago. It is Mammoth for a Persian turquoise gemstone, and to find one that is as perfect as this would be impossible. The color is spectacular in the matrix is awesome being red to black spiderweb. The stone weighs 128 cts is 100% natural. It was cut in Persia up to 60 years ago.