Vesuvianite and Astrophyllite Physical Properties

Vesuvianite

Astrophyllite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.32-3.433.2-3.4

1 7.18

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Fracture

Conchoidal

Uneven

Cleavage

Poor on {110} and {100} very poor on {001}

Perfect on [001] imperfect on [100]

Mohs Hardness

6-73

2 10

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Chemical Composition

Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4

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

Vesuvianite and Astrophyllite Chemical Formula

While comparing Vesuvianite 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 Vesuvianite and Astrophyllite chemical formula.

Chemical formula of Vesuvianite- Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4
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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Vesuvianite and Astrophyllite Specific Gravity

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