Mineral?

[drizzlermibs]

This one looks somewhat like mibs that were ID'd as voting marbles, but the "scuff" mark seems less like a pontil than the others had and it is only one one pole.

 

[gunsil]

looks like a common ceramic marble with a white glaze finish and the mark is simply from laying in the oven.

 

[cheese]

I agree with gunsil.