Louis Vuitton: Details from the Louis Vuitton website as below:\rbr\rbrSMALL EMPREINTE RING IN YELLOW GOLD WITH DIAMOND\rbrQ9A04A\rbr\rbr \rbr\rbr- Empreinte clous ring in 750 thousandths (18 kt)yellow gold\rbr- One diamond\rbr- Part of the Empreinte collection\rbr\rbr£1,710.00\rbr\rbrCartier: Details from the Cartier website as below.\rbr\rbr\rbr\rbrYellow gold\rbrREF: B4085000\rbrA child of 1970s New York, the A collection seals a love that defies boundaries. With undeniably elegant lines and stamped with the trademark screw motif, the creation is a timeless tribute to passionate romance. Studded with diamonds, yellow, white or rose gold.\rbr\rbr18K yellow gold wedding band.\rbrWidth: 3.6 mm\rbr\rbr£780.