Antique “secret compartment” sterling ring!
It has a green with black stripes stone on top which measures about 1/4″ long and 3/16 wide.
The ring has great detailed craftsmanship and looks like it took a very long time to make.
Now for the best part, the secret compartment built into the ring. There is a clasp as seen in the photo that you unlatch to open the ring. When the ring is opened there is plenty of room to hide small objects.
The compartment measures about 7/16″ by 7/16″ wide, just about the right size to fit an asprin.
It is marked 925 in the band