Tanzanite, diamond and platinum ring

Platinum ladies cluster ring with a 3.5mm wide shank and wire basket style head.  Centre claw is set with a 15.9mm x 12.1 mm x 7.6 mm deep (approx 9.68ct) oval medium blue tanzanite.  Around the tanzanite is eithg 0.04 ct brilliant cut F/G V.S diamonds and forty 0.01 ct brilliant cut F/G, V.S diamonds .Total diamond weight is 0.72 ct.  Ring weight is 16.37gms.  Valuation $21,750