Setting: 16 x 27 mm (0.6 x 1.1 in). Halo setting. Handcrafted in solid 9 carat yellow gold (4.60 gr). Natural octagon cut Swiss blue topaz (7.6 ctw) and diamond (0.2 ctw). The perfect Engagement Ring. November Birthstone gift. 4th Wedding Anniversary gemstone. Lifetime Warranty, Appraisal and Gift Box included.