This appears to be a small jacla pendant attached to a ring. I believe the jacla is made of turquoise and shell.
This is attached to a ring, which appears to be silver, although it is unmarked. This could also be made into earrings instead, if desired. The jacla pieces each hang down about 3.75 inches. The ring seems to be a size 7.It measures approximately 17-18mm in diameter. This is a very pretty piece in very good pre-owned condition.