18K YELLOW GOLD, DIAMOND, RUBY AND SAPPHIRE NECKLACE

18k yellow gold necklace set with brilliant-cut diamonds weighing approximately 12-13 ct. (F/G, VS), 10 cabochon rubies weighing approximately 10 ct. and 9 cabochon sapphires weighing approximately 10 ct. L. approximately 42 cm gross weight: 68.60 gr. circa 1975 - 1980