Here is a substantial silvertone ring made in Denmark. I have not been able to identify the maker, who uses a conjoined reverse J as his mark, possibly Jørgen Jensen. An agate stone is held by claws set in the dish of this solid square ring. The ring shank is adjustable. This ring looks unworn.
Condition: Excellent, no visible damage, looks unworn.
Marks: J joined to backwards J, Denmark, 300
Size: top of ring is 1" square. Ring shank is adjustable, to fit any size upwards from its default of UK M, US 6.5, Eu 53