Anorthite and Astrophyllite Physical Properties

Anorthite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.773.2-3.4

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

Uneven, Brittle, Metallic

1.6 Cleavage

Perfect [001] good [010] poor [110]

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

6-6.53

2 10

1.8 Chemical Composition

CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Anorthite and Astrophyllite Chemical Formula

While comparing Anorthite 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 Anorthite and Astrophyllite chemical formula.

Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
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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Anorthite and Astrophyllite Specific Gravity

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