Hey guys, new here. I'll start off by saying I own an antique store. I run across marbles a good bit, but avoid most all of them because I know nothing about them. That was until a few days ago when I acquired a handful of them picking from a former hoarders estate. It was the first time marbles ever really spoke to me. They were like none I had ever really seen before. And I was wondering if you guys could help me Id any of them. One looks shattered, most the rest look pretty used, but cool looking. Any help would be greatly appreciated. I saw a few other posts asking for measurements, what do you guys use to measure them? I'd like to learn a bit about the hobby to help fine tune my picking ability. Thanks, Matthew