Idrialite n. : A bituminous substance obtained from the mercury mines of Idria, where it occurs mixed with cinnabar.

Example:


Taxonomy
Idrialite, free encyclopedia, cinnabar, search, orthorhombic, hydrocarbon, mineral, chemical formula, C22, H14, greenish yellow, light brown, colour, bluish, fluorescence, clay, Slovenia, combustibility.

Defination from the web:
Idrialite. From Wikipedia, the free encyclopedia. Jump to: navigation, search. Idrialite, or Idrialine, is a soft, orthorhombic hydrocarbon mineral, chemical formula: 4[C22 H14]. It is usually greenish yellow to light brown in colour with bluish fluorescence. ...