PLATINUM 2.97CT TANZANITE & DIAMOND RING: Impressive trillion cut 2.97 CT tanzanite is featured in this platinum setting and enhanced by 51 diamonds set in 3 rows around the tanzanite. Diamonds approx. .51 CTW with I1 clarity and H color. Size 6.5. Sold with Gemological Lab & Appraisal Inc appraisal for $15,549 dated November 30, 2017.