pyrostilpnite

noun

py·​ro·​stilp·​nite

-tilpˌnīt

plural -s

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

Word History

Etymology

pyr- + Greek stilpnos glistening + -ite

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