These are vintage Taxo sterling silver and black onyx clip earrings made in Mexico. They have silver marks on back. The diamond shaped onyx is set in sterling silver with silver beads on top of varying size. These are in excellent condition. They measure 1.25 inches x .05 inches and are 13.9 gram silver weight. The backs state 925 TP-5 Mexico. These are lovely and will only go up in value.
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Vintage Taxco Mexican Sterling Silver 925 Onyx Earrings