Coral and Astrophyllite Physical Properties

Coral

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

2.60-2.703.2-3.4

1 7.18

1.5 Fracture

Irregular, Irregular, Gemstones of the world (2001)

Uneven, Brittle, Metallic

1.6 Cleavage

Not Available

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

3-43

2 10

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

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

Coral and Astrophyllite Chemical Formula

While comparing Coral 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 Coral and Astrophyllite chemical formula.

Chemical formula of Coral- CaCO 3Ulrich Henn and Claudio C.
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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Coral and Astrophyllite Specific Gravity

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