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Coral
Coral

Achroite
Achroite



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Coral
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Achroite

Coral and Achroite Physical Properties

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Physical Properties

Tenacity

-
-

Solubility

-
-

Durability

-
-

Specific Gravity

2.60-2.702.90-3.40
1 7.18
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Fracture

Irregular
Uneven, ConchoidalWalter Schumann

Cleavage

None
Indiscernible

Mohs Hardness

3-47-7.5
2 10
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Chemical Composition

CaCO 3Ulrich Henn and Claudio C.
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Coral and Achroite Chemical Formula

While comparing Coral and Achroite 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 Achroite chemical formula.

  • Chemical formula of Coral- CaCO 3Ulrich Henn and Claudio C.
  • Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Coral and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Coral and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Coral and Achroite Optical Properties during the identification of gemstone. Specific gravity of Coral is 2.90-3.40 whereas that of Achroite is 2.90-3.40.