Quintin Wight Specimen Mont Saint-Hilaire hosts superb trillings of epididymite to 1cm. It is fairly abundant at the site in pegmatites and comes in a variety of habits.
Color is usually colorless for singles and white for twins.
Luster is vitreous to silky. Diaphaneity is transparent for single crystals and translucent to opaque on twins. Superb trilling forming tabular or columnar peudohexagonal crystals to 1cm. Fracture is uneven to splintery. Hardness is 6 - 7.