The mineral is moderately abundant in this particular inclusion. The occurrence of rouvelleite within villiaumite and kupletskite within rouvilleite, suggests crystallization of rouvilleite after kupletskite and prior to villiaumite.
Color is pale tan to colorless, but often appears reddish brown due to kupletskite inclusions.
Luster is vitreous to slightly waxy. Diaphaneity is transparent, slightly translucent with inclusions. Crystal Habits include crystalline masses to 3mm and rarely as euhedral prismatic crystals to 1mm. Fracture is uneven. Streak is white.