October Birthstone 1ct Mexican Opal Diamond Pt900 Ring This is a single opal ring with a beautiful rainbow-colored glow. The colors change like an aurora depending on the angle and light. The color of the opal is different for each stone, so why not get your own opal ring, the only one in the world? This gemstone's rarity is increasing. It was purchased and stored after only being tried on. We have not made any size adjustments here. With appraisal certificate October Birthstone Opal: 1.06ct Diamond: 0.08ct Metal: Pt900 Platinum Ring Size: Size 11 Maximum Width: Approximately 8mm Weight: Approximately 4.6g Material: Platinum Accessories: Appraisal certificate Born in October October Birthstone Opal