Antique Diamond, Ruby & Sapphire Ring Circa. 1850 British. This is an absolutely fabulous antique ring. Not only is the setting extraordinary, the stones are wonderful. 15K yellow gold shank tested with 15K acid. The top is silver. 30 old mine cut diamonds with total weight of approximately 1.0 carat. All diamonds tested with a diamond tester. natural oval old mine cut ruby with total weight of approximately .50 carats. Ruby tested with refractive index liquid. Natural old mine cut cornflower blue sapphire with total weight of approximately .45 carats. Sapphire tested with refractive index liquid. Face of the ring measures 5/8 inch x 5/8 inch. 4.3 gr. 2.8 dwt. Unmarked. Size 6 3/4 Can be easily sized by a jeweler. One of the most beautiful rings on the internet market today.