This stone is called "chrysoprase." It's deep green against a brown backdrop. The little accent stone is a faceted peridot.
Chrysoprase was a favorite of Frederick the Great of Prussia, and it can be seen decorating many buildings in Prague. It was first discovered in Poland, but is now found in several places around the world.
I made the ring in my signature ring style where the stone will cross over two fingers.
The ring is made with sterling and fine silver.
The ring is about a size 8 1/2. I can adjust it some for you.