Alexandrite and Annabergite Physical Properties

Alexandrite

Annabergite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.813.07

1 7.18

1.5 Fracture

Not Available

Brittle, Metallic, Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

1,1 ; 3,2.

Perfect on {010}, indistinct on {100} and {102}

1.7 Mohs Hardness

8.52

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

Ni3(AsO4)2•8(H2O)

Alexandrite and Annabergite Chemical Formula

While comparing Alexandrite and Annabergite 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 Annabergite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Annabergite- Ni3(AsO4)2•8(H2O)

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Alexandrite and Annabergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Annabergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Annabergite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.07 whereas that of Annabergite is 3.07.