Scriptura › Dictionary › Tephroite 1 entry 1 source Tephroite Open directly Webster's 1828 Dictionary · 1828 Part of speech: noun (n.) A silicate of manganese of an ash-gray color.
1 entry 1 source Tephroite Open directly Webster's 1828 Dictionary · 1828 Part of speech: noun (n.) A silicate of manganese of an ash-gray color.