Setting: 7 x 4 mm (0.3 x 0.1 in). Four-claw prong setting. Handcrafted in solid 9 carat yellow gold (1.25 gr). Natural oval cut Australian opal (0.45 ctw) and diamond (0.01 ctw). The perfect Engagement Ring. October Birthstone gift. 14th Wedding Anniversary gemstone. Lifetime Warranty, Appraisal and Gift Box included.