Minium - Pb₃O₄

Habit: Scarlet to brownish red, may have a yellowish tint Scaly; commonly earthy, pulverulent, massive. Semitransparent; dull to slightly greasy Luster.

Environment: A rare secondary alteration mineral in some highly oxidized lead-bearing mineral deposits and can form as the product of mine fires.

Etymology: Named from the Latin minium, derived from the Iberian word for cinnabar.