Hi my name is Kim and I have inherited about 600 marbles from my grandfather. He gave them to me in an old army lockbox. I have bought books, gone to the library, downloaded books on my kindle and have asked several other sites for help but I'm still not getting it. There are so many different makers and colors. I don't understand how you do it. How do u identify a marble? I'm so afraid that I will think one is a valuable piece and it turn out to be something totally off. I've read through some of your topics and think it's great that you are helping people like me. I'm gonna post some pics of marbles and I would appreciate any help you could give me. Thanks in advance. Just call me clueless. 😒