Celestine and Alexandrite Physical Properties

Celestine

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

3.90-4.003.69-3.81

1 7.18

1.5 Fracture

Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Not Available

1.6 Cleavage

Perfect on {001}, good on {210}, poor on {010}

1,1 ; 3,2.

1.7 Mohs Hardness

3-3.58.5

2 10

1.8 Chemical Composition

SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

BeAl ₂ O ₄

Celestine and Alexandrite Chemical Formula

While comparing Celestine 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 Celestine and Alexandrite chemical formula.

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

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Celestine and Alexandrite Specific Gravity

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