When in college, 45 yrs ago, I took a silver quarter and sandwiched it in a vice between two smaller washers and peened the silver edge down over the washers into a flat ring all the way round. When I had the edge as round and flat as a ring, I used a coping saw with a metal cutting blade to cut out the center of the quarter, leaving a ring made of coin silver. Gave it to my then girlfriend. It was not nearly so fancy as a fine jewelry project, and was actually sort of crude. It took longer to make it than if I had worked those hours and purchased a ring from a regular jeweler. filing out the rough edges, and then polishing took a lot of work. There are You tube videos on how to do it now. A buddy once made some money turning wrist bangles out of wood on a wood lathe. Some times he would laminate several varied pieces of wood together. But back in the late 1960's and early 1970's many young people really liked that kind of craftsmanship and style.