Antique Tested 18K Yellow Gold and Platinum Twin Diamond By-Pass Ring,Circa 1900,Set with one large old mine cut white diamond weighing approximately 4.10 carats and one fancy cognac-colored old mine cut diamond weighing approximately 4 carats, the shoulders of the ring set with ten old mine cut diamonds weighing approximately.40 carats.,Total weight of diamonds: 8.50 carats,Shank size: 7-1/2