Minerals guide The free application "Minerals guide" is very friendly, it has a beautiful and simple interface. The best choice for a pocket dictionary that is always at hand. From which you can learn a lot of new and interesting things, for example, that: Sinhalite Sinhalite is a borate mineral with formula MgAl(BO4). Kassite (mineral) Kassite is a rare mineral whose chemical formula is CaTi2O4(OH)2. It crystallizes in the orthorhombic crystal system and forms radiating rosettes and pseudo-