Alunite and Azurite Physical Properties

Alunite

Azurite

Add ⊕

1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.93.70-3.90

1 7.18

1.5 Fracture

Conchoidal, Uneven

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

1.6 Cleavage

On {0001}, perfect

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

1.7 Mohs Hardness

3.5-43.5-4

2 10

1.8 Chemical Composition

KAl3(SO4)2(OH)6

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

Alunite and Azurite Chemical Formula

While comparing Alunite and Azurite 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 Alunite and Azurite chemical formula.

Chemical formula of Alunite- KAl3(SO4)2(OH)6
Chemical formula of Azurite- Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Red Gemstones

Alunite Vs Erythrite

Alunite Vs Piemontite

Alunite Vs Kainite

Alunite and Azurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Azurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Azurite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 3.70-3.90 whereas that of Azurite is 3.70-3.90.