Alexandrite and Lepidolite Physical Properties

Alexandrite

Lepidolite

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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

3.69-3.812.80-2.90

1 7.18

1.5 Fracture

Not Available

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

1,1 ; 3,2.

{001} perfect

1.7 Mohs Hardness

8.52.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

Mg 3Si 4O 10(OH) 2Ulrich Henn and Claudio C.

Alexandrite and Lepidolite Chemical Formula

While comparing Alexandrite and Lepidolite 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 Lepidolite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Lepidolite- Mg 3Si 4O 10(OH) 2Ulrich Henn and Claudio C.

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Alexandrite and Lepidolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Lepidolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Lepidolite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.80-2.90 whereas that of Lepidolite is 2.80-2.90.