Here is another hand blown glass marble that glows in bright colors when exposed to UV light. This Black Light Reactive Marble is made of borosilicate COE 33 glass. It reacts to UV flashlights, black light tubes, and other UV lights. It fun to view through a marblescope too.
Jonathan Bowers makes these in Central Pennsylvania. The above video gives you a quick look at what makes these blacklight reactive marbles special.