Ussingite is rare mineral at Mont Saint-Hilaire.
Color is usually colorless to pale pink.
Luster is vitreous to greasy. Diaphaneity is transparent. Crystal Habits include stacked tabular crystals to 2mm, and massive ussingite forming spherical pods. Streak is white. Associated Minerals include aegirine, albite, eudialyte, griceite, lovozerite, lueshite, natrophosphate, pectolite, sodalite, sphalerite, thalcusite and thermonatrite.