Color is white or colorless with shades of gray, blue and green. Transparency Crystals are translucent and rarely transparent. Crystal Habit is usually massive but rare crystals are found in flattened tabular crystals. In many bauxite specimens gibbsite is found in a pisolitic habit. Also found as botryoidal encrustations, concretionary, stalactitic and foliated masses.
Cleavage is perfect in one direction, basal.
Fracture is uneven. Streak is white. Associated Minerals are boehmite , diaspore , azurite , hydrozincite and aurichalcite . Best Field Indicators are crystal habits, hardness, smell and associations.