As Anthony showed us, the stuff at pipemakers is very nice. It is a very decorative type of bamboo. In pipe making it is used for the shanks of pipes for 2 reasons first is it looks really cool and 2nd is that it is very soft on the inside and helps to adsorb moisture in the smoke to give a dryer smoke (a quality that is very desirable in a pipe). Almost forgot to add that thestuff they have listed as puple bamboo is also called black bamboo, it is a puplish to dark charcoal color with lighter colors mixed in. It is very cool. It occures naturally from what I understand.