Vintage black stone knight ring, 8 3/4

Vintage silver size 8 3/4 ring with goldtone floral decor around Central black stone with an engraved knight. Stone appears onyx but is not authenticated. No obvious stamps for brand or metal, but may have a signature "Jim" on the inside (see image). No significant damage but may show expected signs of age for a Vintage piece. Message for more details! Happy to accept reasonable offers or bundle!