The Collaborative International Dictionary
Idrialite
Idrialine \Id"ri*a*line\, Idrialite \Id"ri*a*lite\, n. [Cf. F. idrialine.] (Min.) A bituminous substance obtained from the mercury mines of Idria, where it occurs mixed with cinnabar.
Wiktionary
idrialite
n. (context mineralogy English) A soft, orthorhombic hydrocarbon mineral, usually greenish-yellow to light brown in colour with bluish fluorescence.
Wikipedia
Idrialite
Idrialite, or idrialine, is a soft, orthorhombic hydrocarbon mineral with chemical formula: CH. It is usually greenish yellow to light brown in color with bluish fluorescence.
Raman spectroscopy studies indicate that it may be a mixture of complex hydrocarbons including benzonaphthothiophenes (chemical formula: CHS) and dinaphthothiophenes (chemical formula: CHS).