Rosasite and Alexandrite Physical Properties

Rosasite

Alexandrite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Effervesces in cold

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4-4.23.69-3.81

1 7.18

1.5 Fracture

Splintery

Not Available

1.6 Cleavage

Perfect on {100} and {010}

1,1 ; 3,2.

1.7 Mohs Hardness

48.5

2 10

1.8 Chemical Composition

Not Available

BeAl ₂ O ₄

Rosasite and Alexandrite Chemical Formula

While comparing Rosasite 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 Rosasite and Alexandrite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄

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Rosasite and Alexandrite Specific Gravity

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