CPZ 925 Sterling Silver Baguette Cut Black Onyx Marcasite Ring Size 8

Pre-owned. In good used condition.
There are sign of oxidation and minor scratches.
Baguette Cut Black Onyx 11mm x 9mm.
The height of the dome with a stone approx. 5.2mm.
Width at the top 11mm, at the bottom 3.3mm.
Marked: 925 CPZ (not identified)
Please review pictures.

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