I picked up these yesterday but I'm not the marble collector. My Wife loves her marbles but we don't know anything about them. We just have them in jars on the mantle. We do check to see if any are reactive but that's about it. I'd like some help identifying some of these if anyone would mind helping. The pictured marble is about 3/4 of an inch or so and there are also yellow ones. Thanks for any advice and God Bless