Pearl and Sard Physical Properties

Pearl

Sard

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.60-2.85

2.58-2.63

1.5 Fracture

Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

none

Not Available

1.7 Mohs Hardness

2.5-4.5

6.5-7

1.8 Chemical Composition

Not Available

SiO 2Ulrich Henn and Claudio C.

Pearl and Sard Chemical Formula

While comparing Pearl 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 Pearl and Sard chemical formula.

Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.

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Pearl Vs Precious Opal

Pearl and Sard Specific Gravity

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

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