Tanzanite and diamond set ring, the large central stone estimated at 8.60 carat, predominately blue, within a diamond set mount, with total diamond weight of 1.00 carat, ring size M, 18 ct white gold, hallmarked London 2013, accompanied by IGL London certificate . stone dimensions, 13.5 x 11.32 x 8.00, good condition, minor signs of wear to the shank, has ring size reducer band