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Datolite
Datolite

Kyanite
Kyanite



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Datolite
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Kyanite

Datolite and Kyanite Physical Properties

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Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

2.90-3.003.53-3.65
1 7.18
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Fracture

Conchoidal, Uneven
Splintery

Cleavage

None
[100] perfect [010] imperfect with 79° angle between

Mohs Hardness

5-5.54-7
2 10
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Chemical Composition

CaBSiO 4(OH)Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Al2SiO5

Datolite and Kyanite Chemical Formula

While comparing Datolite and Kyanite 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 Datolite and Kyanite chemical formula.

  • Chemical formula of Datolite- CaBSiO 4(OH)Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Kyanite- Al2SiO5

Datolite and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Datolite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Datolite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Datolite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.