Aragonite and Astrophyllite Physical Properties

Aragonite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Dilute acid

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.93-2.963.2-3.4

1 7.18

1.5 Fracture

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

Uneven, Brittle, Metallic

1.6 Cleavage

Distinct on {010}, imperfect {110} and {011}

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

3.5-43

2 10

1.8 Chemical Composition

CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Aragonite and Astrophyllite Chemical Formula

While comparing Aragonite 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 Aragonite and Astrophyllite chemical formula.

Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
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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Aragonite and Astrophyllite Specific Gravity

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