trimerite
noun
trim·er·ite
ˈtriməˌrīt
plural -s
: a mineral Be(Mn,Ca)(SiO4) consisting of a silicate of manganese, calcium, and beryllium and occurring in salmon-colored tabular crystals (hardness 6–7, specific gravity 3.5)
Word History
Etymology
German trimerit, from Greek trimerēs of three parts + German -it -ite