A Chinese puzzle ball, sometimes known as a devil's work ball, or the Concentric Ball, is an artefact that consists of a number of intricately carved concentric hollow spheres carved from a single solid block of ivory or wood that fit within one another in a way that looks impossible, often consisting of fourteen layers. The practice originated in the Guangdong region of China. The name ”devil's work ball“ in Chinese signifies its extraordinary craftsmanship that seems beyond human capability. C

Chinese puzzle ball, a classic carving art that creates concentric hollow spheres from solid blocks, has long left many in awe. Though traditionally an ivory carving technique, the skill has now been passed on using other materials such as jade or bones. | People's Daily, China

Did you know billiard balls were once made of IVORY?! 🐘🎱 #MysteriesAtTheMuseum | Discovery Channel UK