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Celestine
Celestine

Sard
Sard



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Celestine
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Sard

Celestine and Sard Physical Properties

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Physical Properties

Tenacity

Brittle
-

Solubility

-
-

Durability

-
-

Specific Gravity

3.90-4.002.58-2.63
1 7.18
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Fracture

Conchoidal
Conchoidal

Cleavage

Perfect on {001}, good on {210}, poor on {010}
None

Mohs Hardness

3-3.56.5-7
2 10
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Chemical Composition

SrSO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
SiO 2Ulrich Henn and Claudio C.

Celestine and Sard Chemical Formula

While comparing Celestine and Sard 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 Sard chemical formula.

  • Chemical formula of Celestine- SrSO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.

Celestine and Sard Specific Gravity

Another important criteria for qualitative analysis of gemstones is Celestine and Sard Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Celestine and Sard Optical Properties during the identification of gemstone. Specific gravity of Celestine is 2.58-2.63 whereas that of Sard is 2.58-2.63.