Platinum Semi-Mount Ladies Engagement RingPlatinum Semi Mount Ladies Engagement Ring This beautiful custom engagement platinum ring (All stones are natural diamonds EXCEPT center stone More options below) One Round Cut Natural Diamonds: ave set Halo and pave set beveled shoulders with 0. 40 CTW Center Round Cut CZ 6. 5mm Approx 1. 0 CT We offer the option to add Lab Grown Center Diamond (new) From $1,500 We offer the option to add Lab Grown Moissanite Center Diamond (new) From $650 Faceted