Proustite and Alexandrite Physical Properties

Proustite

Alexandrite

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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

5.51-5.643.69-3.81

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

Distinct on {10 1 1}

1,1 ; 3,2.

1.7 Mohs Hardness

2.58.5

2 10

1.8 Chemical Composition

Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

BeAl ₂ O ₄

Proustite and Alexandrite Chemical Formula

While comparing Proustite 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 Proustite and Alexandrite chemical formula.

Chemical formula of Proustite- Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Proustite and Alexandrite Specific Gravity

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