Alexandrite and Thulite Physical Properties

Alexandrite

Thulite

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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

3.69-3.813.1

1 7.18

1.5 Fracture

Not Available

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

1,1 ; 3,2.

Perfect {010} imperfect {100}

1.7 Mohs Hardness

8.56-7

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

Ca₂Al₃(SiO₄)₃(OH)

Alexandrite and Thulite Chemical Formula

While comparing Alexandrite and Thulite 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 Thulite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Thulite- Ca₂Al₃(SiO₄)₃(OH)

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Alexandrite and Thulite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Thulite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Thulite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.1 whereas that of Thulite is 3.1.