👉 Hydromagnesite is a mineral that is formed in the Earth's crust and is often found in the surface of oceans, lakes, and rivers. It is composed of calcium carbonate crystals arranged in a layered structure called a hydroxyapatite matrix. The minerals in this type of rock are known for their high electrical conductivity, which makes them useful in a variety of applications such as electronics, water filtration, and medical implants. The term "hydromagnesite" refers to