Onyx and Lazulite Physical Properties

Onyx

Lazulite

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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

2.55-2.703.04-3.17

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Indiscernible

{001} Indistinct, {???} Indistinct

1.7 Mohs Hardness

6.5-75.5

2 10

1.8 Chemical Composition

SiO₂

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

Onyx and Lazulite Chemical Formula

While comparing Onyx 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 Onyx and Lazulite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

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Onyx and Lazulite Specific Gravity

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