Green onyx sterling silver solitaire ring size 9

This is a pre owned ring in great shape with a notation that the surface of the stone has some light small surface scratches. Please see all photos.  Green onyx round cut gemstone prong set in authentic 925 sterling silver. Measures a size 9. No hallmarks found. Total weight is 1.77 grams. Stone measures about 7mm in diameter. Reasonable offers considered