Probably platinum, with yellow gold. Open worked with rich setting of 110 diam. in old and rose cut. 18 old cut diam. in total approx. 1 ct. I-J.si-P (1 diam. approx. 0,50 ct.). Pendant 61 x 29 mm, necklace with case lock l. in total 43,5 cm, weight approx. 9 g.