Beautiful Vintage Art Deco 1.25 Carat Center Diamond Plus Sapphires Diamonds Halo Platinum Ring. The center diamond is an old mine cut J color SI 1 clarity. The face of the ring measures 14 mm wide. It has sapphires around it that make the top of the ring look like a beautiful flower. There are 25 additional diamonds making up the design of the ring and 12 gem sapphires. Ring size is 7-1/2.