I thought you might be interested in how I arrange the Micarta slabs to make a handle. It might seem a little backwards, but this works for me. Most Micarta is found in slab form and sometimes I want to end up with a block.
So I cut my 3/8 inch slabs up into pieces, in this case, 3 pieces 2 X 5. I sand the layers to be mated and glue and clamp them taking care to make them as even as I can. I use a good quality super glue. Here's a picture of the end showing the layers.
I then slant the end toward the blade to make it work with my handle drop and scribe an outline of the tang on the outside of the block.
As you see, I milled out the slot, half into one side and half into the other. Then I cut the pencil line with my band saw to split the block. I then reverse their positions since I have a flat smooth surface to glue back to make the completed block with the mortise in place. All of the slab pieces need to be oriented the same from the parent slab. This system works due to the fact that the material does not need to be book matched, however, since I am working from the center out, as it were, It still looks the same from side to side.
The photos were not the best, but they might give the idea of where I was going.