1 marble 

I know very very little about marbles (Am selling for others)  All are strictly identified by Google Lens....)

This one came up with 2 selections and I am unable to tell by looking at them...either Christensen or Vitro agate.

Thanks for your patience with me. 

either Christensen or  Vitro Agate Swirl  Marble

 Old Vtg , Is NOT perfectly round 

.65" 

over 50 years old