Silver ring with an onyx setting. Size: 13 Width: 12mm Weight: 8.5 grams Thickness: 7mm - 1.5mm Material: Likely silver (no reaction to magnets, reacts to silver tarnish remover.) Marked "MXICO," followed by a five-character mark starting with "D" (see photo 5). On the opposite side, there are markings starting with "T" and "9" (likely representing Taxco and the workshop, and the 925 silver mark, which has faded. See photo 6). There are traces of glue between the bezel setting and the stone. It has darkened with age, which I think gives it character. If you wish, I can lightly polish it before delivery. Thank you for looking. Color... Silver Material... Silver Scratches/Discoloration... Yes