Thorogummite is very rare at Mont Saint-Hilaire. Color ranges from pale brown to greenish brown and red-brown. Luster is resinous. Diaphaneity is translucent to opaque. Crystal Habits include radiating acicular crystals to 3mm and embedded grains.
Fracture is conchoidal to splintery.
Streak is brownish. Associated Minerals include aegirine, analcime, astrophyllite, catapleiite, eudialyte, microcline, rhodochrosite, s randite, sodalite and tetranatrolite.