pyrostilpnite

noun
py·​ro·​stilp·​nite | \ -tilpˌnīt\
plural -s

Definition of pyrostilpnite

: a mineral Ag3SbS3 that is a silver antimony sulfide polymorphous with pyrargyrite and occurs in tufts of hyacinth-red monoclinic crystals

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History and Etymology for pyrostilpnite

pyr- + Greek stilpnos glistening + -ite

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