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Star Sapphire
Star Sapphire

Alexandrite
Alexandrite



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Star Sapphire
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Alexandrite

Star Sapphire and Alexandrite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.90-4.053.69-3.81
Amber
1 7.18
1.5 Fracture
Not Available
Not Available
1.6 Cleavage
Not Available
1,1 ; 3,2.
1.7 Mohs Hardness
Not Available8.5
Amber
2 10
1.8 Chemical Composition
Al 2O 3Ulrich Henn and Claudio C.
BeAl 2 O 4

Star Sapphire and Alexandrite Chemical Formula

While comparing Star Sapphire and Alexandrite 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 Alexandrite chemical formula.

  • Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
  • Chemical formula of Alexandrite- BeAl 2 O 4

Star Sapphire and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Sapphire and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.