Kyanite and Wulfenite Physical Properties

Kyanite

Wulfenite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.656.50-7.00

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Irregular, Brittle, Conchoidal

1.6 Cleavage

[100] perfect [010] imperfect with 79° angle between

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

1.7 Mohs Hardness

4-73

2 10

1.8 Chemical Composition

Not Available

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

Kyanite and Wulfenite Chemical Formula

While comparing Kyanite and Wulfenite 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 Kyanite and Wulfenite chemical formula.

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

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Kyanite and Wulfenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Wulfenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Wulfenite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 6.50-7.00 whereas that of Wulfenite is 6.50-7.00.