Reversible Vintage Inlaid Necklace (? Silver)

This necklace is made of several inlaid kite-shaped pieces that have a brown and white stone or shell on one side while other side has a black 'stone' inlay and so it is reversible. It has a simple hook closure typically of the 1970's era. The metal could be real silver but it is not stamped as such. It is very well made and lays high up on the neck area.