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Celestine
Celestine

Alexandrite
Alexandrite



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Celestine
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Alexandrite

Celestine and Alexandrite Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

-
-

Durability

-
-

Specific Gravity

3.90-4.003.69-3.81
1 7.18
👆🏻

Fracture

Conchoidal
-

Cleavage

Perfect on {001}, good on {210}, poor on {010}
1,1 ; 3,2.

Mohs Hardness

3-3.58.5
2 10
👆🏻

Chemical Composition

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

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.