Wow! That box of Sparklers is just...well...wow... I would love to have that in my collection!! Or, have that BE my collection!
Steph, thanks for linking to the thread, too.
Ann, thanks for the description. I've noticed most of what I think are Master Sunbursts have an opaque patch. Whereas, the few (very few, like three) marbles I have which have been identified as Sparklers, don't seem to have an opaque patch. The sparklers seem to have a concentration of the filaments instead of a “patch”. Or I maybe don’t have a clue of which I speak!
Maybe my best option is to acquire a lot of sparklers so I can study them up close
Thanks!!!