Natural stone types are categorized based on their formation processes. The three main categories are igneous, sedimentary, and metamorphic stones. Igneous stones, like granite, form from cooled magma or lava. Sedimentary stones, such as limestone, develop from the accumulation of mineral and organic particles. Metamorphic stones, including marble, arise from existing rocks that undergo transformation due to heat and pressure. Each type of natural stone has unique characteristics and uses. For example, granite is known for its durability and is often used in countertops, while limestone is popular in construction and landscaping. Marble is prized for its beauty and is commonly used in sculptures and flooring. Understanding these types helps in selecting the right stone for various applications.