three amigos .. alike but different. any help id'ing these would be much appreciated !

[DHUNNIE 27]

[William]

What's the base glass? Transparent? Black? Can they be backlit possibly?

[akroorka]

I suspect that these marbles were at the very least--"Buffed".

Maybe a practice group?

I have a bad feeling about these.

Hard to tell the maker.

I appreciate all opinions and hope to see some more.

Marble--On!!