Astrophyllite and Coral Physical Properties

Astrophyllite

Coral

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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

3.2-3.4

2.60-2.70

1.5 Fracture

Uneven, Brittle, Metallic

Irregular, Irregular, Gemstones of the world (2001)

1.6 Cleavage

Perfect on [001] imperfect on [100]

Not Available

1.7 Mohs Hardness

3-4

1.8 Chemical Composition

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

CaCO 3Ulrich Henn and Claudio C.

Astrophyllite and Coral Chemical Formula

While comparing Astrophyllite and Coral 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 Coral 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 Coral- CaCO 3Ulrich Henn and Claudio C.

Compare Green Gemstones

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Astrophyllite Vs Black Opal

Astrophyllite and Coral Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Coral Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Coral Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.60-2.70 whereas that of Coral is 2.60-2.70.