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Aragonite
Aragonite

Polyhalite
Polyhalite



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Aragonite
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Polyhalite

Aragonite and Polyhalite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Dilute acid
Soluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.93-2.962.78
Amber
1 7.18
1.5 Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Conchoidal, Brittle
1.6 Cleavage
Distinct on {010}, imperfect {110} and {011}
Perfect on {10 1 }; parting on {010}
1.7 Mohs Hardness
3.5-43.5
Amber
2 10
1.8 Chemical Composition
CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Not Available

Aragonite and Polyhalite Chemical Formula

While comparing Aragonite and Polyhalite 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 Polyhalite chemical formula.

  • Chemical formula of Aragonite- CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
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Aragonite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Aragonite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 2.78 whereas that of Polyhalite is 2.78.