Pao Ferro. A south american tropical hardwood. It's starting to become very popular as a fingerboard wood. I was first exposed to it while working for Peavey in their guitar factory. We used it for fretless bass FBs. Doesn't have as much "red" as rosewood, is a bit harder than EI rosewood, but not quite as hard as ebony. Great wear charactistics regarding it's use as a fretless bass FB. Very stable, glues easily. More of milk chocolate color.....here's a photo of one of my basses using "morado"{pao ferro)....the tailpiece is cocobolo(Mexican rosewood)....