Centered on a prong set cushion cut blue topaz (18.7 x 15.6 x 9.9 mm) weighing approximately 22.0 carats within a halo of prong set round brilliant cut diamonds weighing approximately .80 total carat (I-J color, SI1-SI2 clarity) on a split shank stamped 18K and with a maker's mark.

26mm; Ring size 7

10.6 dwt.

One diamond with chip to pavilion; otherwise good estate condition.