The Joint

The Luban puzzle (or Lu Ban suo) is a classical Chinese joinery puzzle attributed to Lu Ban, a master carpenter from the 5th century BC. The form is six interlocking pieces that assemble into a cube without nails, glue, or fasteners. Traditionally it was carved in wood as a teaching object for apprentice carpenters — a physical lesson in the mathematics of joinery.

We chose travertine because the open pore reads as honest in the joint. In wood, the joinery hides behind grain. In stone, the cuts are visible, the contact surfaces are visible, the way each piece holds the others is visible. The puzzle becomes the form.

An object to handle. Pick it up, take it apart, turn the pieces over, put them back together. Some owners disassemble it for guests to figure out. Some leave it assembled as a small sculpture on a shelf or desk. It works both ways. It is the kind of object people pick up without thinking, which is part of what it does in a room.

Each piece is its own. The pattern of open pores, the streaks where iron and other minerals settled, the rhythm of light and dark across the six pieces — none of it can be predicted before the slab is cut. We do not sort or select for uniformity. Your piece will have its own pattern, different from the photograph and from the next one.

Desk, side table, bookshelf, mantel. Anywhere it can be picked up. Eye level or hand level, not high on a shelf where it becomes purely visual.

For the full material story, see the Materials page.

Travertine handles regular handling well. The pieces only need attention when they show it.

• Wipe with a dry cloth before handling. Oils from skin can darken open-pored stone over time.
• If it gets marked, a light pass with a damp cloth and a drop of pH-neutral soap. Dry immediately.
• Avoid acidic cleaners. Reseal annually if it sits on a desk where it gets touched daily.
• The pieces only go together one way. Reassembly takes a moment of attention.

For the full procedure, see the Care Guide.

Drop 01 opens in spring 2026. Register your interest above to be the first to know when it opens.

When the drop opens, you'll have 14 days to secure your piece. Once the drop closes, your piece is made for you by hand. Lead time from drop close to delivery is 8 to 10 weeks. Production places per piece are limited and some pieces will sell their production slots before the drop closes.

The Oculus on the same surface. Both pieces are objects, not utilities. The Newel pair as smaller companion forms. The Lintel as bookends with The Joint between them.

How difficult is the puzzle to solve?

The Luban form has one solution and six pieces, so it is not trivial. Most first-time solvers take 5 to 15 minutes if they have not seen one before. Once you have done it twice, it takes about thirty seconds. The first time is the only time it is genuinely hard.

Do the pieces fit together tightly?

Hand-carved stone is not machined to micron tolerances. The fit is firm but not forced. If a piece is sticking, do not push — reorient and try again. The puzzle assembles without effort when the pieces are in the right order.

Can the pieces chip if they fall?

Travertine is harder than it looks, but a piece dropped onto a hard floor from desk height can chip at an edge. If it happens, the chip is usually small enough to polish smooth, and the chip becomes part of the piece's character. Handle the puzzle over a soft surface when learning.

Is The Joint a good gift?

It is one of the pieces in the range that travels best as a gift. The puzzle is universally interesting, the stone is universally recognised as a considered material, and it asks nothing of the recipient except an empty surface.

Does the piece come assembled or in parts?

It ships assembled, with each piece labelled discreetly on a hidden face so you can reassemble it the same way if you want to. Most owners disassemble and reassemble it in their own order.