Jarosite's crystals are more flattened and resemble nearly cubic rhombohedrons. Color is an amber yellow or brown. Luster is vitreous to resinous. Crystals are transparent to translucent. Crystals are somewhat scarce and small, more commonly as earthy masses, films or crusts, botryoidal and granular.
Cleavage is good in one direction but only seen in the larger crystals.
Fracture is uneven. Hardness is 2.5 - 3.5. Streak is a pale yellow. Associated Minerals are barite , turquoise , galena , goethite , limonite , hematite and other iron minerals. Best Field Indicators are crystal habit, associations, color and hardness.