Lady's Platinum 7.50ct Heart Shaped Rubellite & Diamond Filigree Ring. Ring Size: 6? (Can be Resized to Fit Most Any Finger) Contains: 1 Heart Shape Cut Natural Rubellite Weight Approx: 7.50ct, Color: Pinkish-Red, Clarity: Transparent-LI. 79 Round Brilliant Cut Natural Diamonds. Weight Approx: 1.00cttw, Color: G-H, Clarity: VS1/VS2. An astoundingly beautiful natural rubellite tourmaline configured in a rare heart-shape cut. My gemmologist was raving about this stone. He said that rubellites are the cream of the pink and red tourmaline crop. It is mounted in a peak style platinum mounting. A giant show for the money.