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Gypsum
Gypsum

Sard
Sard



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Gypsum
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Sard

Gypsum and Sard Physical Properties

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1 Physical Properties
1.1 Tenacity
Flexible
Not Available
1.2 Solubility
Soluble
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.20-2.402.58-2.63
Amber
1 7.18
1.5 Fracture
Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on {010}, distinct on {100}
Not Available
1.7 Mohs Hardness
26.5-7
Amber
2 10
1.8 Chemical Composition
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
SiO 2Ulrich Henn and Claudio C.

Gypsum and Sard Chemical Formula

While comparing Gypsum 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 Gypsum and Sard chemical formula.

  • Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
  • Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.

Gypsum and Sard Specific Gravity

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