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Malachite and Petalite Physical Properties


Petalite and Malachite Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
insoluble   

Durability
Not Available   
Not Available   

Specific Gravity
3.25-4.10   
2.40   

Fracture
Conchoidal, Conchoidal, Gemstones (2009), Uneven   
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal   

Cleavage
Perfect on { 2 01} fair on {010}   
Perfect on {001}, poor on {201} with 38.5° angle between the two   

Mohs Hardness
3.5-4   
6-6.5   

Chemical Composition
Cu2CO3(OH)2   
LiAlSi 4O 10Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   

Optical Properties >>
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Malachite and Petalite Chemical Formula

While comparing Malachite and Petalite 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 Petalite chemical formula.

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Malachite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Malachite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Malachite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Malachite is 2.40 whereas that of Petalite is 2.40.

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