What is a mineral of an iron-black color, and very sectile, consisting principally of sulphur, antimony, and silver called?
miargyrite — A mineral of an iron-black color, and very sectile, consisting principally of sulphur, antimony, and silver. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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