This very interesting Indian Made Ring is a size 8 1/4. It is a wide ring over 1/4 inch and tapered in the back. It is made like two rings and then bonded together. It is marked 10 and Sterling. It is regular man-made opal on one side and black opal on the other side. There are sterling channel lines on each gem piece. This can be a man's ring or a woman's ring. I have always worn it on my middle finger. It is an interesting and unusual ring and will always cause a comment. To you from the High Plains of Kansas.