2.
Depending on the glass chemistry, the temperature (viscosity) and/or the distance traveled, two glasses can interact and create a third color at the boundary layer.
This can be seen on Peltier Superman marbles. There is usually a dark line between the yellow/blue and the red/blue.
Now, there are Akro hybrids where another color is actually introduced as they switch over colors. Reference Popeye Hybrids.
Sorry, but your sample is not one of those lucky samples. Beautiful sample, though!
P.S. The blue and orange are across the color wheel from each other. This creates a complimentary tension. Your marble is a keeper. Now, try to find five more samples. This is what makes collecting fun! Good luck!! 🍀