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Star Sapphire
Star Sapphire

Kyanite
Kyanite



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Star Sapphire
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Kyanite

Star Sapphire and Kyanite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.90-4.05
3.53-3.65
1.5 Fracture
Not Available
Splintery, Brittle, Metallic
1.6 Cleavage
Not Available
[100] perfect [010] imperfect with 79° angle between
1.7 Mohs Hardness
Not Available
4-7
1.8 Chemical Composition
Al 2O 3Ulrich Henn and Claudio C.
Not Available

Star Sapphire and Kyanite Chemical Formula

While comparing Star Sapphire 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 Star Sapphire and Kyanite chemical formula.

  • Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
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Star Sapphire and Kyanite Specific Gravity

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