About half of corks spin one way, half the other. Not sure how the direction one spins can be a trait. Pelts can spin either way too or not at all. How do you explain the ram's heads then, which swirl both ways?
I find these in bags at thrift stores. They are intentionally made like this (sort of a pyramid/gum drop shape), not intended to be a marble. They are for flower vases and decoration. Modern.
Yes on Heaton B/Gs. We used to put them with the Champions because like Ric says, Champ made them too and we didn't know Heaton did until recent years. The champ ones have a whiter base and a busier "wad of chewed gum" pattern generally. Here's a champ single pic and a Heaton collage pic.
It's Asian all day. If you haven't seen any like it yet in your very short time dealing with marbles, that doesn't make it so. I've collected since the 1980s and still see things I haven't seen before. I have a jar of these I keep around and put the rest in tubs full of marbles to give kids at marble shows. On facebook groups you'll find people who will agree with anything.