Atacamite and Alexandrite Physical Properties

Atacamite

Alexandrite

Add ⊕

1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.745-3.7763.69-3.81

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Brittle

Not Available

1.6 Cleavage

Perfect on {010}, fair on {101}

1,1 ; 3,2.

1.7 Mohs Hardness

3-3.58.5

2 10

1.8 Chemical Composition

Cu2Cl(OH)3

BeAl ₂ O ₄

Atacamite and Alexandrite Chemical Formula

While comparing Atacamite and Alexandrite 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 Alexandrite chemical formula.

Chemical formula of Atacamite- Cu2Cl(OH)3
Chemical formula of Alexandrite- BeAl ₂ O ₄

Compare Green Gemstones

Atacamite Vs Chlorite group

Atacamite Vs Clintonite

Atacamite Vs Cordierite

Atacamite and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Atacamite and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Atacamite and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Atacamite is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.