Stones are solid, naturally occurring substances made up of minerals or mineral-like matter. They can vary in size, shape, and color, and are commonly found in nature. Some well-known types of stones include granite, marble, and limestone, each with unique properties and uses. Stones have been used by humans for thousands of years, primarily in construction and tools. They are also important in landscaping and art, with gemstones being valued for their beauty and rarity. Additionally, stones play a crucial role in geology, helping scientists understand the Earth's history and processes.