Orpiment - As₂S₃

Habit: Distinct crystals are uncommon, Commonly in foliated columnar or fibrous aggregate, lemon-yellow to golden or brownish yellow crystals, may be reniform or botryoidal. Short prismatic crystals uncommon. Resinous to pearly Luster, transparent

Environment: A low-temperature Hydrothermal mineral, occurring in veins and hot-spring deposits. Also occurs as an alteration product of other arsenic-bearing minerals.

Etymology: From the Latin auripigmentum, "golden paint" in allusion to its color