👉 Stalagmites are a type of crystal formation in which crystals grow from smaller crystals that have been formed through a process called weathering. They are commonly found on the surface of water or ice bodies, such as stalactites and stalagmites, where they can be seen and touched. Stalagmites are typically made up of calcium carbonate crystals that have been broken down over time by the action of water. As water enters a body of water, it carries dissolved minerals with it,