Museum Chalcopyrite is a rare mineral at Mont Saint-Hilaire. Color is brass-yellow, sometimes with iridescence. Luster is metallic. Diaphaneity is opaque. Crystal Habits include sharp disphenoids to 2 - 3mm and as embedded masses.
Fracture is uneven.
Hardness is 3.5 - 4. Streak is green black. Associated Minerals include biotite, galena, pyrite, pyrrhotite and sphalerite.