Very delicately done Onyx 35" Necklace with small beading on edge of each section surrounding the Onyx stone in hand-done design, all very secure, no movement on the stones, tight! we forget what ancient civilization this was a M.M.A. copy of; maybe Roman. hardly ever worn, all is perfect,no loss of color, no chips, not even flea-bites to the stones, a dramatic piece. Clasp is perfect too.Looks like 24K. gold wash and the metal under is brass.. not certain and do not want to scratch surface to find out.