Cartier Rubellite, Diamond and Ruby Ring in 18 Karat Yellow Gold with Platinum Accents. This Ring Features an Emerald Cut Rubellite with an Estimated Total Weigh of 13 Carats Surrounded by Single Cut Diamonds and Round Cut Rubies. Very good condition. The lively purplish pink rubellite is lightly included; the deep red rubies are lightly included with some bearing minor chips and/or cavities. The 16 diamonds weigh approximately .90 carat, and are approximately G-H color, VS clarity. The marks may be found on the exterior of the shank’s base