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Cat s Eye
Cat s Eye

Biotite
Biotite



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Cat s Eye
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Biotite

Cat s Eye and Biotite Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

3.5-3.82.7-3.3
1 7.18
👆🏻

Fracture

-
Uneven, Even

Cleavage

1,1 ; 3,2
Perfect on the {001}

Mohs Hardness

8.52.5-3.0
2 10
👆🏻

Chemical Composition

BeAl 2 O 4
K(Mg,Fe++)3[AlSi3O10(OH,F)2

Cat s Eye and Biotite Chemical Formula

While comparing Cat s Eye and Biotite 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 Cat s Eye and Biotite chemical formula.

  • Chemical formula of Cat s Eye- BeAl 2 O 4
  • Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2

Cat s Eye and Biotite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cat s Eye and Biotite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cat s Eye and Biotite Optical Properties during the identification of gemstone. Specific gravity of Cat s Eye is 2.7-3.3 whereas that of Biotite is 2.7-3.3.