Gorgeous Blue Fire Opal Ring ►Made of solid sterling silver with rhodium finish (925)►Accented With Simulated Diamonds (CZ)►October birthstoneCenter Stone: Fire OpalColor: BlueStone cut: RoundGem size: 6.0x 6.0 mmAverage Carat Weight: 1 ct.Gemstone creation: Lab-Created✓ 100% Nickel-Free✓ Hypoallergenic✓ Comfort Fit✓ Free Ring Box✓ Free USA Shipping