Brooch with sapphire,

Brooch with faceted oval-cut sapphire, approx. 11 x 6 mm, approx. 3.5 ct, very beautiful colour, 14K yellow gold, 20.5 g, L: approx. 51.4 mm, W: approx. 22.4 mm, 2nd half of the 20th century, minimal signs of wear, with hallmark 'M'.