Modernist Overlapping Etched Leaves Collar Necklace Hand Made 17 1/2"

A vintage necklace with overlapping etched leaf designs and alternating dark beads that have a wood grain like texture and hammered silver metal beads.  Not sure what the materials are.
Measure 17 1/2" long and 3" at the widest.  
Hook closure holds securely.  Weighs 49 Gr.
Nice vintage condition. 
Cool MCM design.