Hello, new to the forum.
I've been digging out some childhood items to box & store in the attic. Came across a 32 oz covered cup of marbles. Can anyone help with I'd on these 3? Pretty sure I dug the big one up around '79 or so. Not even LED tac light will shine through. Looks like a cobalt blue? Any help with Id as well as good books to help with the rest would be greatly appreciated. Thanks in advance. Been reading some topics here & looks like a good spot.