That's a real brick - they were very popular with players back in the day and they really don't even look like a brick until they get a bunch of surface wear. Calling mint ones bricks almost seems silly since most don't look anything like a brick. ๐
I should say, the marble you posted might be Peltier but the only way I would call that is if it was in original packaging because there are just too many foreign ones that look like the split oddballs. And having said that, I still think yours is probably foreign. ๐
Back in the 60s-70s there was sort of a "fried marbles" craze in the arts and crafts world. I remember my Mom "frying" some and making a bunch of grapes from them.
That looks much more like a Peltier. If they have any vanes at all they are usually greatly reduced - maybe more like ridges. Here are some big ones . . .
The purple ones look like slags. Most of the red ones on the right appear to be Akro Moss Agates. That is what appears to be a very nice larger Peltier Bronze Zebra in the middle of the photo - it warrants a closer look - check it for AV. And that's an Akro Corkscrew to the right of it. The yellow patches up top also appear to be Moss Agates.
That'll help a lot for the German handmade aficionados here and I'll let them handle these two - may need another view or two to get a good look at the core to make a proper ID.
The two on the left and the second one in the bottom row look like Alleys to me. The third in the bottom row looks like an Akro Corkscrew. I wouldn't dare a guess on the others without more views, but the two green ones on the right look like game marbles from this one.
Top row looks like 3 Peltier Feathered Slags and two Peltier Multicolor Swirls.
Bottom row looks like 2 more Peltier slags, an amber slag (need more views to ID) and two West Virginia Swirls.
The bigger blue one up front looks like an Akro Spiral (snake).
Nice marbles.
The black one upper left is intriguing - can you tell what it is made from? And you can put those German swirls in a glass of water if you want to get a good look at the innards.
Lots of clay marbles sometimes called "commies" and some Benningtons (the glazed ones with the "eyes"). The yellow on on top upper left is interesting, and the blue lined one below it looks like it might be a variegated clay - Jasper type marble.