They are mates, or opposites. Glued a piece of stabilized walnut to a piece of stabilized amboyna with a piece of paper in between for easy separation. Cut them with a bandsaw before separating them, swapped the pieces and reassembled with a liner and epoxy held in a vice. I had a bunch of walnut kicking around in the garage, I'm so impressed with how it comes out of the stabilization process. Takes at least 48 hours of constant vacuum to get the air out of it though, approx 1x2x5 inch pieces, I have to put a fan blowing on my pump to keep it cool otherwise it gets noisy (Robinair 15310).
That's a cool idea and they look great. It's hard to come up with different ideas when doing something like this but that's a great one.
Thought I'd post some pictures of the process. The 1st one looks like some type of ice cream sandwich good enough to eat.