Puzzle balls or devil’s work balls originated in China and were usually carved from bone or ivory. They are very intricate and consist of concentric hollow spheres carved from a single solid block that fit within one another in a way that looks impossible. [1]
While Chinese puzzle balls are very intricate, European ones tend to have smooth surfaces.
Below are some examples and price guides of puzzle balls including a 19th Panjab ball and a large canton ivory ball with it’s stand.