Alexandrite and Rosasite Physical Properties

Alexandrite

Rosasite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Effervesces in cold

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.814-4.2

1 7.18

1.5 Fracture

Not Available

Splintery

1.6 Cleavage

1,1 ; 3,2.

Perfect on {100} and {010}

1.7 Mohs Hardness

8.54

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

Not Available

Alexandrite and Rosasite Chemical Formula

While comparing Alexandrite and Rosasite 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 Rosasite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄

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Alexandrite and Rosasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Rosasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Rosasite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 4-4.2 whereas that of Rosasite is 4-4.2.