CHEMICAL CHARACTERISTICS
Cu5[Si6O7] - 7H2O
hydrated copper silicate
PHYSICAL CHARACTERISTICS
Main color
blue
Other colors
green
blue - green shades or green - bluish
Color of streak
green
Luster
silky, vitreous
Hardness
2.0 to 2.5
Density
2.80 to 2.90
Fracture