Covellite and Astrophyllite Physical Properties

Covellite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Flexible

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.6-4.763.2-3.4

1 7.18

1.5 Fracture

Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic

Uneven, Brittle, Metallic

1.6 Cleavage

Perfect on {0001}

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

Not Available3

2 10

1.8 Chemical Composition

CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

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

Covellite and Astrophyllite Chemical Formula

While comparing Covellite 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 Covellite and Astrophyllite chemical formula.

Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

Covellite Vs Fluorapatite

Covellite Vs Elbaite

Covellite Vs Falcons Eye

Covellite and Astrophyllite Specific Gravity

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