Cerussite
Chemical Formula	Lead carbonate: PbCO3
Species	Carbonates
Crystal System	Orthorhombic
Mohs Scale	3
Specific Gravity	6.53-6.57
Color	Colorless, white, gray, blue, or green
Streak	White
Luster	Adamantine, Vitreous, Resinous, Pearly, Dull, Earthy
Refractive Index	n = 1.803 n = 2.074 n = 2.076
Diaphaneity	Transparent, Translucent
Cleavage	Distinct/GoodOn and distinct; on and in traces.
Fracture	Conchoidal
Crystal Habit：Massive granular, reticulate, tabular to equant crystals
Geological Setting：Commonly occurs in the upper oxidized zones of base metal deposits, especially lead-silver deposits.