24k gold & oxidized silver “Thames” marquise shape faceted London blue topaz ring set in 24k gold bezel and accented with white round side diamonds set in silver bezels; Topaz is at 6x12mm. Details & Care: Collection: Amazing Mesmerizing Gems Metals: Gold 24k, Oxidized Sterling Silver Gemstone: Topaz 1.65 ctw and Diamond is 0.02 ctw Color: Blue