|Color||Dark and light blue, turqoise|
|Cleavage||perfect in two directions.|
|Mohs scale hardness||3.5|
|Luster||Dull to vitreous|
|Specific gravity||approximately 4.1 (rather heavy for a non-metallic mineral)|
|Optical properties||translucent to opaque|
Shattuckite is a mineral, a copper silicate hydroxide with formula Cu5(SiO3)4(OH)2. It crystallizes in the orthorhombic - dipyramidal crystal system and usually occurs in a granular massive form and also as fibrous acicular crystals.
Shattuckite is a relatively rare copper silicate mineral. It was first discovered in the copper mines of Bisbee, Arizona, specifically the Shattuck Mine (hence the name). It is a secondary mineral that forms from the alteration of other secondary minerals. At the Shattuck Mine, it forms pseudomorphs after malachite. A pseudomorph is an atom by atom replacement of a crystal structure by another crystal structure, but with little alteration of the outward shape of the original crystal.