Azurite and Lapis lazuli Physical Properties

Azurite

Lapis lazuli

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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

3.70-3.90

2.50-3.00

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Perfect on {011}, fair on {100}, poor on {110}

3,6

1.7 Mohs Hardness

3.5-4

5.5

1.8 Chemical Composition

Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

Azurite and Lapis lazuli Chemical Formula

While comparing Azurite and Lapis lazuli 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 Azurite and Lapis lazuli chemical formula.

Chemical formula of Azurite- Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

Compare Gems for Sagittarius

Azurite Vs Goldstone

Azurite Vs Lapis lazuli

Azurite Vs Lazulite

Azurite and Lapis lazuli Specific Gravity

Another important criteria for qualitative analysis of gemstones is Azurite and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Azurite and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Azurite is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.