This is a beautiful and rare pair of drop dangle pierced earrings made of Sterling Silver, black onyx and malachite enamel.  The faces on these 2 1/4" drop dangle earrings looks almost like animals but are probably tribal masks.  I believe they are of black onyx.  They have malachite head pieces and collars, as well as long dangles from the collars.  There are Sterling Silver head pieces and the entire bases of the earrings are Sterling.  These earrings are both signed on the back Sterling Mexico 925 and Taxco I believe.