Vintage Dinosaur Bone Pearl and Onyx Pendant Pin

Vintage artisan made Modernist pendant / pin in sterling silver with gold filled accents. 

The large stone is dinosaur bone. It is also set with a genuine cultured pearl and a black onyx. 

It has both a bail and a pinback with locking clasp. Hallmarked D g& D sterling. Measures 1 7/8" tall by 1 5/8" wide. Weight: 14 grams.