Good mineral specimens are available and can be quite attractive, but mostly under magnification. Color is colorless, white, pale green or yellow. Luster is vitreous to dull. Crystals are translucent to transparent. Crystal Habits include prismatic crystals with a pinacoidal termination.
Cleavage is poor in one direction.
Fracture is subconchoidal. Streak is white. Best Field Indicators are hardness, color, luster and locality.