A Brooch Art Deco 750/1000 gold and 950/1000 platinum set with an oval cut Ceylon sapphire with an approximate weight of 4.40 ct, and 60 antique brilliant cut diamonds with an approximate total weight of 5.90 ct. French 20th C. (the 30s) French warranty marks, without marks, pursuant to Decreto-Lei No. 120/2017, of 15 September - art. 2, paragraph 2(c) Dimensões (altura x comprimento x largura) - 5,5 cm; Peso - 16,4 g. Notes: Provenance: Jewelry collection of a soprano opera singer of the São Carlos National Opera House, Lisbon.