Alexandrite and Norbergite Physical Properties

Alexandrite

Norbergite

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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

3.69-3.813.177

1 7.18

1.5 Fracture

Not Available

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

1.6 Cleavage

1,1 ; 3,2.

{???} Distinct

1.7 Mohs Hardness

8.56-6.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)

Alexandrite and Norbergite Chemical Formula

While comparing Alexandrite and Norbergite 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 Norbergite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Norbergite- Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)

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Alexandrite Vs Fluorite

Alexandrite and Norbergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Norbergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Norbergite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.177 whereas that of Norbergite is 3.177.