Magnificent 14K White Gold Ruby Diamond Three-Stone Three Stone 3-Stone Ring. The natural center ruby measures 10 mm long by 8 mm wide and weighs about 2 carats. There are 2 brilliant round diamonds measuring 4.4 mm in diameter each, with a total weight of .70 of a carat. The diamonds are H color and SI clarity. The top of the ring measures 5/8 of an inch long by 3/8 of an inch wide. This ring is a size 6.5. Sizing is available. It weighs 6.6 grams.