RENO, Ohio -- They start out as red-hot globules of glass. They are spit from a furnace built in 1932, and tumble through a series of parallel rollers and come out the other end as perfect spheres -- ...

If you’ve held onto old marbles from childhood or stumbled across a dusty jar in the attic, you might be wondering if they’re worth anything. Not all old marbles have high value, but certain handmade, ...