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Malachite
Malachite

Achroite
Achroite



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Malachite
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Achroite

Malachite and Achroite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.25-4.102.90-3.40
Amber
1 7.18
1.5 Fracture
Conchoidal, Conchoidal, Gemstones (2009), Uneven
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
1.6 Cleavage
Perfect on { 2 01} fair on {010}
Not Available
1.7 Mohs Hardness
3.5-47-7.5
Amber
2 10
1.8 Chemical Composition
Cu2CO3(OH)2
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Malachite and Achroite Chemical Formula

While comparing Malachite and Achroite 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 Achroite chemical formula.

  • Chemical formula of Malachite- Cu2CO3(OH)2
  • Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Malachite and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Malachite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Malachite and Achroite Optical Properties during the identification of gemstone. Specific gravity of Malachite is 2.90-3.40 whereas that of Achroite is 2.90-3.40.