NECKLACE Yellow gold, with interlocking links, centred at the neckline by an oval sapphire weighing approximately 10.50 cts and a green tourmaline set in a clasp. Gross weight: 50.2 g (18k - 750). A green tourmaline and 18k gold necklace set with an oval shaped sapphire weighing approximately 10,50 cts. RC : Secured ratchet clasp. Hallmark: F, an insect, R, in a horizontal lozenge. Dimensions of the stone: approx. 15.2 x 1.5 x 7.9 mm. Internal length: approx. 43 cm.