I have seen this on a couple cue makers cues, using exotic woods for joint caps like cocobolo and tulipwood for example. I recently had a local cue-smith replace the SS piloted joint on my Jacoby with a birdseye joint collar. The cue was heavy to begin with so that took a lot off plus it looks very good because the cue has a cocobolo forearm and butt with a birdseye handle with black phenolic rings at a,b,c and d, it looks really sharp. I played with it a little timid at first fearing that I would crack it but its been over a week now and I am starting to appreciate the feel of the joint now. It is becoming my regular playing cue now and I am loving it. I am going to get it refinished by Jacoby cuz it has some major dings in it and I want him to replace the buttcap with a birdseye cap also, should look pretty slick and not affect the play of it. I'll post pictures if anyone is interested.