kermesite
noun
ker·mes·ite
| \ ˈkərmēˌzīt, -mə̇ˌsīt; kərˈmeˌsīt\
plural -s
Definition of kermesite
: a mineral Sb2S2O consisting of antimony oxysulfide occurring usually as tufts of cherry-red capillary crystals and resulting from the alteration of stibnite
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