Vintage Tiffany & Co. Brooch Chrysoprase 18k Gold OnyxA gorgeous Tiffany & Co. brooch, made of chrysoprase and 18k gold, featuring onyx. The broochs geometry centers on a circular onyx base that serves as a backdrop for an intricate openwork design. The latter is made up of interlocking gold curves, forming a symmetrical floral pattern. Surrounding the central motif are four chrysoprase cabochons, each shaped into a half moon and set into the outer circle of the brooch. The gold framework allows each