Vtg 14k Gold Greek Key and Heavy Black Onyx Necklace 1970's Elegant Large Chic

20 inch long large onyx bead and 14K yellow gold accent necklace. Large 1 1/2 centimeter onyx beads with five 14K gold stations. They are barrel shaped and have a Greek key or oriental serpent art deco design. The oriental style box clasp is signed 14K and has been tested. Very heavy substantial piece. In excellent condition. 1970's 1980's vintage. Please message me with any questions