Alexandrite and Star Sapphire Physical Properties

Alexandrite

Star Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.813.90-4.05

1 7.18

1.5 Fracture

Not Available

1.6 Cleavage

1,1 ; 3,2.

Not Available

1.7 Mohs Hardness

8.5Not Available

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

Al 2O 3Ulrich Henn and Claudio C.

Alexandrite and Star Sapphire Chemical Formula

While comparing Alexandrite and Star Sapphire 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 Alexandrite and Star Sapphire chemical formula.

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

Compare Gems for Scorpio

Alexandrite Vs Citrine

Alexandrite Vs Gahnospinel

Alexandrite Vs Fluorite

Alexandrite and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.