What is rain stones?

Rain stones, also known as "mud balls" or "clay balls," are small, hard round balls formed by the combination of sediment and water in streams or rivers. These stones are typically found in areas with high levels of sediment deposition and slow-moving water currents. The process of their formation typically involves the accumulation of fine-grained sediments around a core of organic material, such as a leaf or twig, which is slowly cemented together by minerals in the water over time. Rain stones can vary in size from a few millimeters to several centimeters in diameter and are often used as decorative stones in landscaping or as garden ornaments.