Checkout the Honduras Rosewood riser on Bob's site. It looks very similar as well.
Whatever wood it is it is beautiful!
Dave, I will say my Shawnee with Dakota foam carbon limbs is much faster than my Cheyenne. Feels very natural in the hand as well. Very quite and as you said with a little work it is easy to make Bob's bows whisper quiet. It did take me a day or so to get adjusted with it being faster than the Cheyenne.
I am going to have to be on the look out for these Cheyenne LB limbs now! Can not wait to see what they can do!