Unique Vintage Single Strand Short Necklace with Black & Green Beads & Disks

This is quite a unique vintage necklace. It consists of a single strand of beads and disks. There are faceted black beads that look like jet, round green beads and larger flat round beads with a marbled finish in green, black, yellow and orangish-brown. The marbled beads measure approximately 1” diameter. Necklace is 16” long + 3” extender and lobster claw clasp. Good-Used Condition.