18K Opal Diamond Ring Diamonds and Opal The opal's color changes depending on the angle, displaying play-of-color in blue, red, orange, and green. It was purchased at a very high price, but the appraisal certificate and box were not kept, and my mother stored it in a jewelry box. With the rising price of gold, I don't think this item can be purchased at this price now. I hope someone will use it. It has hardly been used, so there are no noticeable scratches, and the condition is very clean. [Material] Yellow Gold K18 [Type of Stone] Opal 1.8ct / Diamond 0.53ct [Ring Size] Size 10 [Total Weight] Approx. 5.0g