Kyanite and Lazulite Physical Properties

Kyanite

Lazulite

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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

3.53-3.653.04-3.17

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Uneven, Uneven, Gemstones of the world (2001) More from other references

1.6 Cleavage

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

{001} Indistinct, {???} Indistinct

1.7 Mohs Hardness

4-75.5

2 10

1.8 Chemical Composition

Not Available

(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

Kyanite and Lazulite Chemical Formula

While comparing Kyanite and Lazulite 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 Lazulite chemical formula.

Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

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Kyanite and Lazulite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Lazulite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Lazulite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.04-3.17 whereas that of Lazulite is 3.04-3.17.