Astrophyllite and Chrysoberyl Physical Properties

Astrophyllite

Chrysoberyl

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.43.69-3.81

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Uneven, Conchoidal to uneven, Brittle, Metallic, Uneven, ConchoidalWalter Schumann, Brittle, Metallic

1.6 Cleavage

Perfect on [001] imperfect on [100]

Distinct on {110}, imperfect on {010}, poor on {001}

1.7 Mohs Hardness

38.5

2 10

1.8 Chemical Composition

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

BeAl ₂ O ₄

Astrophyllite and Chrysoberyl Chemical Formula

While comparing Astrophyllite and Chrysoberyl 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 Chrysoberyl 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 Chrysoberyl- BeAl ₂ O ₄

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Astrophyllite and Chrysoberyl Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Chrysoberyl Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Chrysoberyl Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.69-3.81 whereas that of Chrysoberyl is 3.69-3.81.