Princess Cut Genuine Sapphire Diamond Ring. By John C Rinker SZ 7. This is a beautiful vintage ring – Princess Cut Genuine deep blue Sapphire and Diamond ring by John C Rinker in 10K Yellow Gold SZ 7. Measures 9 mm x 9 mm (approx 4.12 Carats). With 1 small round cut genuine diamond on each side. All in a solid 10 K yellow gold setting. Setting at widest: 12 mm wide. Shank: 2 mm wide. Sits off finger: 7 mm high. Stamped: 10 K JCR. This is a vintage item in lovely. Condition, does show some scuffing on band. Owned by a collector, packed away for years. Please take a close look at the pictures as they serve as part of the description. You get exactly what you see in the pictures. If you have ANY questions.. Just let me know! Your satisfaction is very important to me. I always leave feedback once an item is paid for. Once you have received your item… The item “Cushion Cut Genuine Sapphire Diamond ring-John C Rinker 10K Yellow Gold SZ 7″ is in sale since Saturday, February 29, 2020. This item is in the category “Jewellery & Watches\Vintage & Antique Jewellery\Fine\Retro, Vintage 1930s-1980s\Rings”. The seller is “something-x-tra” and is located in Barrie, ON. This item can be shipped worldwide.