SINCE 1828
niccolite
noun
nic·co·lite
| \ ˈnikəˌlīt\
plural -s
Definition of niccolite
: a mineral NiAs of a pale copper red color and metallic luster usually occurring massive and composed essentially of a nickel arsenide (hardness 5–5.5, specific gravity 7.33–7.67)
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Merriam-Webster unabridged
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