Cerussite and Alexandrite Physical Properties

Cerussite

Alexandrite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.46-6.57

3.69-3.81

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal

Not Available

1.6 Cleavage

Good [110] and [021]

1,1 ; 3,2.

1.7 Mohs Hardness

3-3.5

8.5

1.8 Chemical Composition

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

BeAl ₂ O ₄

Cerussite and Alexandrite Chemical Formula

While comparing Cerussite 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 Cerussite and Alexandrite chemical formula.

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

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Cerussite and Alexandrite Specific Gravity

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