Violet Anderson Royal Ontario Museum Eudialyte is widespread at Mont Saint-Hilaire. It can be found as excellent crystals with vibrant color. Luster is vitreous on smaller crystals, and vitreous to greasy for the larger crystals. Diaphaneity is transparent on smaller crystals, translucent to opaque on larger crystals. Crystal Habits include subhedral crystals to 5cm and crystalline masses.
Fracture is uneven to conchoidal.
Streak is white. Associated Minerals include aegirine, albite, amphibole group, catapleiite, fluorite, mangan-neptunite, microcline, nepheline, pectolite, polylithionite, pyrochlore, s randite, steacyite and tetranatrolite.