Kyanite and Legrandite Physical Properties

Kyanite

Legrandite

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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

3.53-3.653.98-4.04

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

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

Imperfect, poor one {100}

1.7 Mohs Hardness

4-74.5-5

2 10

1.8 Chemical Composition

Not Available

Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Kyanite and Legrandite Chemical Formula

While comparing Kyanite and Legrandite 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 Legrandite chemical formula.

Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Kyanite and Legrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Legrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Legrandite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.98-4.04 whereas that of Legrandite is 3.98-4.04.