Here's a manual coffee bean grinder. It's absolutely lovely and the same size (22cm high) as a six cup Moka pot. So clever to have the same shape/design as the stove top coffee pots. They're definitely good enough looking to leave on the counter.
They work on the same idea as a pepper mill really. You can loosen/tighten the mechanism depending on how coarse you like your ground coffee. It has an excellent grippy base to keep it still while you're, er, grinding. Made from aluminium and cast steel.