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Atacamite
Atacamite

Smithsonite
Smithsonite



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Atacamite
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Smithsonite

Atacamite and Smithsonite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

3.745-3.7764.00-4.65
1 7.18
👆🏻

Fracture

Conchoidal
Uneven, Sub-Conchoidal

Cleavage

Perfect on {010}, fair on {101}
Perfect on [1011]

Mohs Hardness

3-3.55-5.5
2 10
👆🏻

Chemical Composition

Cu2Cl(OH)3
ZnCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Atacamite and Smithsonite Chemical Formula

While comparing Atacamite and Smithsonite 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 Atacamite and Smithsonite chemical formula.

  • Chemical formula of Atacamite- Cu2Cl(OH)3
  • Chemical formula of Smithsonite- ZnCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Atacamite and Smithsonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Atacamite and Smithsonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Atacamite and Smithsonite Optical Properties during the identification of gemstone. Specific gravity of Atacamite is 4.00-4.65 whereas that of Smithsonite is 4.00-4.65.