This is a great looking piece of light Glacial Blue Peruvian Opal . Solid light ice blue. It is a grade A beautiful piece! This piece was mined in the mountains of Peru and comes direct to us from a small mining family around Lima. Weighing in at 25g/125ct, this piece with its beautiful solid color will make some beautiful cabochons for jewelry. It! It is 100% natural, untreated, unaltered real Peruvian Blue Opal