tritomite

noun
trit·​o·​mite | \ ˈtritəˌmīt\
plural -s

Definition of tritomite

: a complex fluosilicate chiefly of calcium, thorium, cerium, yttrium, and containing boron

History and Etymology for tritomite

German tritomit, from Greek tritomos thrice cut + German -it -ite; from the fact that the crystals leave trihedral cavities in the gangue

Keep scrolling for more