Malachite and Purpurite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.25-4.10
3.2-3.4
Fracture
Conchoidal, Conchoidal, Gemstones (2009), Uneven
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
Perfect on { 2 01} fair on {010}
[100] [001] perfect
Mohs Hardness
3.5-4
4-4.5
Chemical Composition
Cu2CO3(OH)2
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Malachite and Purpurite Chemical Formula
While comparing Malachite and Purpurite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Malachite and Purpurite chemical formula.
- Chemical formula of Malachite- Cu2CO3(OH)2
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Malachite and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Malachite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Malachite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Malachite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.