I inherited a big box o'marbles from someone who saved them from childhood, probably more than 60 years ago. They came to me because I make glass mosiacs, but I don't want to ruin anything valuable. But I have no clue how to get started identifying value. I've found a few websites, and now I'm completely overwhelmed. I think I understand pontils, but apparently some are pretty hard to see. I have some marbles that look like they have small pinholes in them, some have creases, and some have larger round marks with a point in the center (like a tiny volcano). Some of the marbles are quite pretty, and most are in really nice condition. I'm hoping to find a few good reference books and websites. Suggestions?
