What is a mineral of a yellowish color, consisting chiefly of silica, glucina, manganese, and iron, with a little sulphur called?
helvite — A mineral of a yellowish color, consisting chiefly of silica, glucina, manganese, and iron, with a little sulphur. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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