K18WG White Gold 18k Ring, Size 12, Approximately 2.3g Measurements taken with my own instruments. Selling to organize my collection. The main diamond (0.1ct) is designed to swing, making this a ring that brightens up your hand. Purchased as a pre-owned item in Tokyo. I believe the original price was around 100,000 yen. The diamond fluoresces. I cannot include the certificate of authenticity because it contains personal information. Due to the nature of the item being precious metal and to prevent switching, returns and refunds are not accepted. Markings: K18WG 0.10 0.01 Ring Size: 12 Stone: Diamond