Likely Harry Winston Emerald, Diamond & Diamond-Simulant Pendant

Likely Harry Winston, designed with a diamond-simulant chain now suspending an emerald, 36 x 24mm, and enhanced with a border of 97 round brilliant-cut diamonds, marked 750 OR, total 88.04 dwt. Pendant not original, now joined to the necklace. 97 round brilliant-cut diamonds, total approximately 15.40 carats, average G-I color, average VS clarity, 1 tumbled emerald, bluish green, highly included, 36 x 24 mm, Overall condition is good, wear commensurate with age. minor discoloration to metal. Modification to pendant, where it was attached permanently to the necklace, pendant and necklace marriage. Professional cleaning is recommended. Provenance: From the Estate of Baroness Gabriele Langer von Langendorff
Condition Report: 97 round brilliant-cut diamonds, total approximately 15.40 carats, average G-I color, average VS clarity, 1 tumbled emerald, bluish green, highly included, 36 x 24 mm, Overall condition is good, wear commensurate with age. minor discoloration to metal. Modification to pendant, where it was attached permanently to the necklace, pendant and necklace marriage. Professional cleaning is recommended.