Vintage Black Mourning Beaded Necklace

Older 25 strand of Onyx / Obsidian beads with silver colored shell looking piece and round beads(they do tarnish and smell like silver to me, but could be plated). All the beads are different sizes, but roundish. It has a hook and eye clasp. It is 29" long. VERY CLASSY AND SHINY. VERY GOOD CONDITION