Lady's 18K White Gold Pink Tourmaline and Diamond Dish Ring. Ring Size: 6 1/2 (Can be Resized to Fit Most Any Finger) Contains: 1 Cushion Cut Pink Tourmaline Weight: 5.78ct. Round Brilliant Cut Natural Diamonds. Weight: 0.49ct. A rare and beautiful pink tourmaline recently purchased in Neiman Marcus for $6,000. Its owner has asked me to sell it to the best offer. I compromised at $3,000 and we cut our commission to make them happy.