Beautiful Vintage Necklace from Natural Stone Elegant 3 Levels Beaded Necklace European Vintage Boho factory Unusual

Beautiful vintage beaded necklace from Europe of 1970s or so. Elegant and rich looking jewelry. The atoneisnatural but I am not sure what kind of atone is it.
The necklace jas 3 levels of beads and beautiful clasp. You can wear it ckasp ahead or clasp back, botg styles will be beautiful. Length of the necklace is 50 cm.
Excellent vintage condition, excellent style. factory