Malachite and Astrophyllite Physical Properties

Malachite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.25-4.103.2-3.4

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones (2009), Uneven

Uneven, Brittle, Metallic

1.6 Cleavage

Perfect on { 2 01} fair on {010}

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

3.5-43

2 10

1.8 Chemical Composition

Cu₂CO₃(OH)₂

(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Malachite and Astrophyllite Chemical Formula

While comparing Malachite and Astrophyllite 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 Astrophyllite chemical formula.

Chemical formula of Malachite- Cu₂CO₃(OH)₂
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

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Malachite and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Malachite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Malachite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Malachite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.