Hydroboracite is a hydrated borate mineral (hence the name) of calcium and magnesium, whose chemical composition is CaMgB6O8(OH)6·3H2O. Its name is In allusion to the composition, being a HYDRated BORAte.
Hydroboracite is an uncommon borate mineral. It is one of the borate minerals that form vitreous, silky, fibrous crystal clusters. Hydroboracite is similar to Ulexite, which is another more common borate that forms similar fibrous aggregates and thus both minerals are not easy to distinguish. Hydroboracite's silky lustre is quite attractive.
Hydroboracite is widely used in the production of ceramic frits, enamels, glass fibre and particularly in Agriculture.