The ring is sterling silver, with 5 small diamonds embedded.  Marked 925 and tested to confirm.  Most of the ring appears to have an anti-tarnish plating of rhodium; there is some wear to the plating on the back exterior of the ring visible in photo 5.  Otherwise, some light wear typical of storage and prior use – there may be a few small scuffs, scratches, spots, nicks, tarnish, etc, please see photos for full details and close-ups.