Malachite
Malachite is a mineral from the carbonate group,it's chemical formula is Cu2CO3(OH)2.It is found in oxidation zones of copper deposits.It is found worldwide and is used as jewelery mainly and smelting into copper.1.Hardness:3.5-4 on the Moh scale.
2.Color:Green to dark green
3.Specific gravity:3.6-4
4.Cleavage:{201} Perfect,{010} Fair.
5.Habit:Stalctitic,massive,botryoidal.The habit of the crystals are prismatic,acicular and tabular.
6.Fracture:Subconchoidal to uneven.
7.Luster:Vitreous - Silky.
8.Streak:Light green
Some other properties that malachite shows are:
A.Diaphaneity:Translucent to opaque.
B.Crystal system:Monoclinic-prismatic.
C.Twinning:Penetration twinning and Polysynthetic twinning.