1.5-Inch Copper Cube

Yes. Each metal cube is a solid piece of the material stated in its specifications, rather than a hollow shell or plated object. That matters because the point of the cube is to make properties such as density physically tangible: equal-sized cubes in different metals can feel dramatically different in the hand.

Use the dimensions in the individual product specifications as the reference for that cube. Each cube is machined as a precise geometric object with chamfered edges, so the faces are flat and the corners are comfortable to handle.

That depends on the metal. Copper develops a patina, a unique darkening of the material which makes every piece special. Titanium, tantalum and niobium change very little. Keep a cube clean and dry if you'd prefer to hold on to its original look.

For routine care, wipe the cube with a clean, soft cloth and avoid abrasive cleaning that could alter the finish. If the surface has changed naturally, particularly on copper, decide whether you want to preserve that patina before using any metal-cleaning product.

Because density is mass packed into a given volume. Two cubes can have exactly the same dimensions but contain very different amounts of mass because their materials have different densities. Comparing equal-sized cubes is one of the simplest ways to experience that material property directly rather than as a number in a table.

It weighs 0.5kg, or 1.1lb, in a cube measuring 38.1mm on each side. That gives it a distinctly substantial feel without making it unwieldy: you can still hold it comfortably in one hand, but its mass is impossible to overlook.

The larger 38.1mm faces give copper’s warm colour and surface more visual space than the smaller cubes. As handling and air gradually affect the metal, any changes in tone can become part of the object’s appearance across a noticeably larger area.