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Mottramite
Mottramite

Kyanite
Kyanite



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Mottramite
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Kyanite

Mottramite and Kyanite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
-

Durability

-
-

Specific Gravity

5.93.53-3.65
1 7.18
👆🏻

Fracture

Sub-Conchoidal
Splintery

Cleavage

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

Mohs Hardness

34-7
2 10
👆🏻

Chemical Composition

PbCu(VO4)(OH)
Al2SiO5

Mottramite and Kyanite Chemical Formula

While comparing Mottramite 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 Mottramite and Kyanite chemical formula.

  • Chemical formula of Mottramite- PbCu(VO4)(OH)
  • Chemical formula of Kyanite- Al2SiO5

Mottramite and Kyanite Specific Gravity

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