Spectacular platinum, blue zircon and diamond brooch. The brooch features a center blue zircon appx. 6.20 carat flanked by two Old Mine-cut diamonds appx. 0.50 ctw., in the center is an OMC diamond appx. 0.75 carat, underneath that is an OMC diamond appx. 0.60 carat. There are twenty prong set, square-cut blue zircon appx. 17.00 carats. Atop the piece are three OMC diamonds appx. 0.30 ctw. On each side, midway to bottom, are two bezel set diamonds appx. 0.40 ctw. There are eleven baguette-cut diamonds, appx. 0.35 ctw. Bead set throughout the brooch are forty-five single-cut diamonds appx. 1.25 ctw. The diamonds are overall VS1-SI1/ GH and the brooch is millgrain throughout. The brooch overall is appx 2 1/4" x 1 1/2". Very good condition.