18k yellow gold bow brooch presenting an oval cut sapphire of about 3.50 cts in a setting of old and pink brilliant cut diamonds, the pin clasp. Sapphire certified by the GemParis laboratory as being of Thai origin and heated (S2-2). Work end of the 19th century. Sapphire size : 11,3 x 8,6 x 4,9 mm Height 1,8 cm - Width : 5,2 cm - Gross weight : 10,5 g