Sardonyx and Topaz Physical Properties

Sardonyx

Topaz

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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

2.55-2.70

3.49-3.57

1.5 Fracture

Not Available

Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Not Available

[001] Perfect

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

SiO 2Ulrich Henn and Claudio C.

Al₂SiO₄(F,OH)₂

Sardonyx and Topaz Chemical Formula

While comparing Sardonyx and Topaz 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 Topaz chemical formula.

Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

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Sardonyx and Topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sardonyx and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sardonyx and Topaz Optical Properties during the identification of gemstone. Specific gravity of Sardonyx is 3.49-3.57 whereas that of Topaz is 3.49-3.57.