3 necklaces

Three fabulous necklaces that look wonderful on their own or layered together. Each is a collectors piece on its own. Zsiska modernness piece, vintage multi huge blue beaded piece, and a very heavy, dark faux pearl piece (black onyx? Black obsidian? Black tourmaline? Certainty real stone but not sure which of these this heavy black “pearl” necklace is. My best guess is tourmaline due to the weight). Three very high-quality costume pieces, priced specially as a set.