Topaz and Carnelian Physical Properties

Topaz

Carnelian

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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

3.49-3.57

2.58-2.64

1.5 Fracture

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

Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

[001] Perfect

Absent

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

SiO₂

Topaz and Carnelian Chemical Formula

While comparing Topaz and Carnelian 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 Topaz and Carnelian chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Carnelian- SiO₂

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Topaz and Carnelian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Carnelian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Carnelian Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.58-2.64 whereas that of Carnelian is 2.58-2.64.