Astrophyllite and Amazonite Physical Properties

Astrophyllite

Amazonite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.2-3.42.55-2.57

1 7.18

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Fracture

Uneven

Cleavage

Perfect on [001] imperfect on [100]

2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal

Mohs Hardness

36-6.5

2 10

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Chemical Composition

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

KAlSi₃O₈

Astrophyllite and Amazonite Chemical Formula

While comparing Astrophyllite and Amazonite 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 Astrophyllite and Amazonite chemical formula.

Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Amazonite- KAlSi₃O₈

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Astrophyllite and Amazonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Amazonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Amazonite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.55-2.57 whereas that of Amazonite is 2.55-2.57.