The marbles are thought to be Peltier since the origin on Gropper boxes is Ottawa, IL.
Photos are from an auction Steph posted in 2007:
The forum's search function is a wonderful thing. 🙂
Bottom line . . . in the case of the OP marble, onyx = slag and vice versa. I just didn't want the Steven to get the idea that his marble was not a slag.
I understand your thinking but it's pretty esoteric for cheap kid's toys. It's probably better to think about base glass and striping glass rather than opaque and transparent glass. Slags and transparent swirls have transparent base glass and opaque striping glass, regardless of their proportions.
And nice (recent) slag too. Does it react to UV?
They all look foreign (more Euro than Asian) to me. I don't think the right one would qualify as a "Pincer" (don't think I've heard of a "pincher"). It looks a bit more like a "sparkler" type, IMO.
It looks like a foreign Cat's Eye to me too, although I can sorta see why you might have initially thought Pelt - that seam in the last pic is a little deceiving.
@Carowill Okay, I think I figured it out, the Golden Zebra is the orange on white and the Golden Dragon is the orange on yellow - just had to think on it for a bit. lol