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Kyanite
Kyanite

Lepidolite
Lepidolite



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Kyanite
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Lepidolite

Kyanite and Lepidolite Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

-
-

Durability

-
-

Specific Gravity

3.53-3.652.80-2.90
1 7.18
👆🏻

Fracture

Splintery
Uneven

Cleavage

[100] perfect [010] imperfect with 79° angle between
{001} perfect

Mohs Hardness

4-72.5
2 10
👆🏻

Chemical Composition

Al2SiO5
Mg 3Si 4O 10(OH) 2Ulrich Henn and Claudio C.

Kyanite and Lepidolite Chemical Formula

While comparing Kyanite and Lepidolite 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 Kyanite and Lepidolite chemical formula.

  • Chemical formula of Kyanite- Al2SiO5
  • Chemical formula of Lepidolite- Mg 3Si 4O 10(OH) 2Ulrich Henn and Claudio C.

Kyanite and Lepidolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Lepidolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Lepidolite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 2.80-2.90 whereas that of Lepidolite is 2.80-2.90.