18K 3.15 CT TOURMALINE SAPPHIRE & DIAMOND RING: A single oval mixed cut tourmaline appox 3.15 CT rated VS in clarity is featured in a .30 CTW diamond bezel in this white gold domed ring. 97 mixed cut sapphires approx. 4.07 CTW. Size 6.75. Weight 11.4 grams. Sold with current Florida Diamond Appraisers GIA graduates appraisal for $3875.