Museum Sphalerite is common in all rock environments at Mont Saint-Hilaire. Several large gemstones have been cut.
Color varies from yellow, green, brown, red, orange, black or colorless.
Luster is adamantine to dull. Crystal Habits include simple tetrahedra to 7cm, tetrahedra, pseudo- octahedra, dodecahedra, modified dodecahedra and flat twinned pseudohexagonal crystals. Fracture is conchoidal. Hardness is 3.5 - 4. Streak is pale brown to white.