1) Monoclinic mineral 
Malayaite is a calcium tin silicate mineral with formula CaSnO[SiO4]. It is a member of the titanite group. ==Discovery== Malayaite was originally found in Perak (a state in Malaysia) and was first described in literature in 1961, though it was not yet given a name. In 1965, the mineral was named and recognized by the International Mineralogical A...