Hydrated minerals are minerals that contain water molecules within their crystal structure. This water is chemically bonded to the mineral, which can affect its physical properties, such as color, hardness, and stability. Common examples of hydrated minerals include gypsum and zeolite. The presence of water in these minerals often influences their formation and occurrence in nature. Hydrated minerals can form in various environments, such as sedimentary settings or through the alteration of other minerals. Their unique characteristics make them important in fields like geology, mining, and environmental science.