Green multi beaded 50" necklace, not sure if these are green onyx or not.

This is a beautiful multi beaded! green jade color 50 " necklace. The flat faceted beads and the other beads are much darker than picture shows. it could be green onyx with seed beads, or lucite beads, not sure. The flat beads have a gold band all the way around them. This is a very pretty necklace. Has an older looking clasp so may be vintage. It is not branded.