Connection clasp made of sterling silver and 14 kt. gold, with a chain with onyx beads

Connection clasp made of sterling silver with detail of 14 kt. gold, plus a necklace with matt polished onyx beads, bead diameter 8 mm. Clasp measures approx. 2.5x2.5 cm. Length incl. clasp is approx. 47½ cm. This item comes from a discontinued goldsmith.