Augelite and Astrophyllite Physical Properties

Augelite

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

2.70-2.753.2-3.4

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Uneven, Brittle, Metallic

1.6 Cleavage

From the Greek for luster, for its pearly luster on the cleavage.

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

4.5-53

2 10

1.8 Chemical Composition

Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Augelite and Astrophyllite Chemical Formula

While comparing Augelite 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 Augelite and Astrophyllite chemical formula.

Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael 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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Augelite and Astrophyllite Specific Gravity

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