Site Builder Like this maybe
Yup - but that one appears darker than most I have seen - I don't know if you can dye it, or if that is it's natural color.
It comes in two forms - "full bead," where the surface is like a series of small pebbles, or "shaved," where the pebbles have been shaved down to a smoother surface (which also changes the color presentation). Really cool stuff when you see it in person. It seems pretty rare to find in very large sizes, so it is often used as trim, rather than a whole seat pan.
Seatmaker said some time ago that he had a nice piece.