How to Identify Katalox

Start with weight and hardness, because Katalox is one of the heaviest woods you are likely to handle from Mexico or Central America. A board feels dense and cold in the hand, and most offcuts sink in water. A thumbnail or knife point barely marks the surface — the wood resists denting the way few temperate hardwoods do. If a dark board is strikingly heavy and rock-hard, Katalox belongs on the short list.

Read the color and the sapwood boundary next. Heartwood runs from reddish and purplish brown through deep chocolate to nearly black, sometimes with darker streaking, and freshly cut surfaces can carry a faint purple tint that deepens with exposure. Crucially, the sapwood is sharply demarcated and very pale — yellowish to almost white — so a board showing an abrupt jump from near-black heartwood to a light margin is a strong Katalox cue. The transition is clean, not gradual.

Look at the grain, texture, and end grain. The grain is straight to occasionally interlocked, with a fine, tight, even texture and closed pores that give a smooth, high-luster surface when polished — matching the fine, tight, straight grain on our sample. On the end grain the pores are small and diffuse (this is a diffuse-porous hardwood, not ring-porous like oak), fairly evenly scattered rather than banded, and the wood is dense enough that a cleanly sheared end grain looks almost featureless to the naked eye. There is no strong scent; freshly worked Katalox has at most a faint, nondescript odor rather than the aromatic smell of woods like rosewood or cedar.

The main confusions are with other very dark, dense tropical woods. True ebony (Diospyros) is even more uniformly jet-black and finer still, usually without Katalox's reddish or purple undertone. Wenge is dark brown-black but coarser, with distinctive alternating black and light-brown lines and a much more open, splintery grain. Rosewoods (including Dalbergia) tend to show bolder streaking and a distinct sweet-to-spicy scent when cut, which Katalox lacks. Purpleheart shares the purple cast when fresh but oxidizes to violet-brown rather than near-black and is lighter in tone overall. Weight, the sharp pale sapwood line, and the absence of scent together separate Katalox from most of these.