Shop › Polished Black Onyx Mexican Sterling Stud Earrings Image 1 of 2 Image 2 of 2 Polished Black Onyx Mexican Sterling Stud Earrings Sale Price: $32.00 Original Price: $44.00 Purchased Hallmark: 925 MexicoMeasures: 1 inch long Purchased Added! Hallmark: 925 MexicoMeasures: 1 inch long