Cassiterite vs Chrysocolla

Property Cassiterite Chrysocolla
Formula SnO2 (Cu,Al)2H2Si2O5(OH)4 · nH2O
Crystal System Tetragonal Orthorhombic
Mineral Class 04 Oxides and Hydroxides 09 Silicates
Mohs Hardness 6.0-7.0 2.0-4.0
Color Brown, black, reddish-brown, yellow Blue, blue-green, green, turquoise
Luster Adamantine Vitreous
Streak White to pale brown White to pale blue
Transparency Translucent Translucent
Cleavage Poor {100} None
Fracture Subconchoidal to uneven Conchoidal

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