Wulfenite and Alexandrite Physical Properties

Wulfenite

Alexandrite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.50-7.003.69-3.81

1 7.18

1.5 Fracture

Irregular, Brittle, Conchoidal

Not Available

1.6 Cleavage

On {011}, distinct; on {001}, {013}, indistinct

1,1 ; 3,2.

1.7 Mohs Hardness

38.5

2 10

1.8 Chemical Composition

PbMoO 4Walter Schumann , Gemstones of the world (2001)

BeAl ₂ O ₄

Wulfenite and Alexandrite Chemical Formula

While comparing Wulfenite 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 Wulfenite and Alexandrite chemical formula.

Chemical formula of Wulfenite- PbMoO 4Walter Schumann , Gemstones of the world (2001)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Wulfenite and Alexandrite Specific Gravity

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