Honestly, from afar it looks like a black and white chocolate. Up-close you reveal a very innovative approach on a keyboard. Disregard the usual plastic and choose a wooden experience.
The Engrain keyboard was designed by a student in Brooklyn and there were several tests done to establish fabric (including stone and sand). Finally, wood was the best option, for comfort and familiarity. Each key has a different texture and position. This allows your fingers to know their location on the keyboard. A production of these would be just lovely. Be careful with termites, though.
Seen on This Is Colossal.