Violet Anderson Royal Ontario Museum Harmotome is widespread in small quantities at Mont Saint-Hilaire and is indistinguishable visually from phillipsite. Color is usually colorless or white. Luster is vitreous. Diaphaneity is transparent to translucent. Crystal Habits include very small clusters of cruciform twins or prismatic crystals on other minerals.
Fracture is uneven to subconchoidal.
Streak is white.