Aragonite vs Galena

Property Aragonite Galena
Formula CaCO3 PbS
Crystal System Orthorhombic Cubic (Isometric)
Mineral Class 05 Carbonates and Nitrates 02 Sulfides and Sulfosalts
Mohs Hardness 3.5-4.0 2.5-2.8
Color Colorless, white, yellow, blue, green Lead-gray
Luster Vitreous Metallic
Streak White Lead-gray
Transparency Transparent Opaque
Cleavage Poor {010} Perfect cubic {001}
Fracture Subconchoidal Subconchoidal

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