Astrophyllite and Hematite Physical Properties

Astrophyllite

Hematite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.2-3.4

Uneven

Perfect on [001] imperfect on [100]

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

Brittle

5.00-5.30

Uneven, ConchoidalWalter Schumann, Conchoidal

None, may show partings on {0001} and {10 1 1}

Fe 2O 3Arthur Thomas , Gemstones (2009)

Astrophyllite and Hematite Chemical Formula

While comparing Astrophyllite and Hematite 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 Hematite chemical formula.

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Astrophyllite and Hematite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Hematite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite Vs Hematite during the identification of gemstone. Specific gravity of Astrophyllite is whereas that of Hematite is .