Sardonyx and Spinel Physical Properties

Sardonyx

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.70

3.64-3.66

1.5 Fracture

Not Available

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Not Available

None, but may exhibit slight parting

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

SiO 2Ulrich Henn and Claudio C.

MgAl₂O₄

Sardonyx and Spinel Chemical Formula

While comparing Sardonyx and Spinel 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 Sardonyx and Spinel chemical formula.

Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.
Chemical formula of Spinel- MgAl₂O₄

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Sardonyx and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sardonyx and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sardonyx and Spinel Optical Properties during the identification of gemstone. Specific gravity of Sardonyx is 3.64-3.66 whereas that of Spinel is 3.64-3.66.