1) Cubic mineral 
Majorite is a type of garnet mineral found in the upper mantle of the Earth. Its chemical formula is Mg3(Fe,Al,Si)2(SiO4)3. It is distinguished from other garnets in having Si in octahedral as well as tetrahedral coordination. Majorite was first described in 1970 from the Coorara Meteorite of Western Australia and has been reported from various ot...