( n. )
Native strontium sulphate, a mineral so named from its occasional delicate blue color. It occurs crystallized, also in compact massive and fibrous forms.
( n. )
Native strontium sulphate, a mineral so named from its occasional delicate blue color. It occurs crystallized, also in compact massive and fibrous forms.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012