Katalox is also called “Mexican Ebony" and is very hard and dense. I like to call it “Poor Man’s Lignum" because it is very similar in qualities to Lignum Vitae, but much more affordable. It is almost as dense if not the same and is actually harder than Lignum. It is slightly lighter than Lignum, and is more readily available and as a result is more affordable. The pieces that I have worked with had a distinct purple color, but it is known to be black in color. Here is a link to a standard Katalox bokken.