Emerald and diamond clip, mounted by Cartier, 1930s
The octagonal step-cut emerald, framed by circular-cut and baguette diamonds, engraved Monture Cartier and numbered, French assay and maker's marks, case.
Accompanied by SSEF report no. 64565, stating that the emerald is of Colombian origin, with a moderate amount of oil in fissures.
August von Finck (1898-1980), thence by descent.
Cf: Stefano Papi, ‘The Jewels of the Romanovs, Family and Court’, London 2010, page 285 for an illustration of this brooch which was originally in the collection of Queen Marie of Romania.