Aragonite and Atacamite Physical Properties
Solubility
Dilute acid
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.93-2.96
3.745-3.776
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Conchoidal, Conchoidal, Brittle
Cleavage
Distinct on {010}, imperfect {110} and {011}
Perfect on {010}, fair on {101}
Mohs Hardness
3.5-4
3-3.5
Chemical Composition
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cu2Cl(OH)3
Aragonite and Atacamite Chemical Formula
While comparing Aragonite and Atacamite 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 Aragonite and Atacamite chemical formula.
- Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Atacamite- Cu2Cl(OH)3
Aragonite and Atacamite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Aragonite and Atacamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Atacamite Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 3.745-3.776 whereas that of Atacamite is 3.745-3.776.