Emerald and Lazulite Physical Properties

Emerald

Lazulite

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Physical Properties

Tenacity

Solubility

Durability

Hard

Specific Gravity

2.67-2.783.04-3.17

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann

Uneven

Cleavage

Imperfect on the [0001]

{001} Indistinct, {???} Indistinct

Mohs Hardness

7.5-85.5

2 10

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Chemical Composition

Be₃Al₂SiO₆

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

Emerald and Lazulite Chemical Formula

While comparing Emerald 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 Emerald and Lazulite chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

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Emerald and Lazulite Specific Gravity

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