This is a black jade artifact from the Neolithic period in China, dating back 5,000 to 7,000 years ago. It features round patterns carved into an animal, suggesting some religious significance. It's a valuable and fascinating piece, predating Japan's Jomon period (specifically the early to middle phases). The overall weathering of the carvings suggests that the stone itself was not originally weathered, but rather that the carved stone was buried underground for many years, leading to its current condition. This piece has a provenance, having been excavated from Chifeng City, Inner Mongolia. The price will be reduced periodically, so please consider it.