Topaz and Chrome-Chalcedony Physical Properties

Topaz

Chrome-Chalcedony

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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

3.49-3.572.55-2.70

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

[001] Perfect

Not Available

1.7 Mohs Hardness

86.5-7

2 10

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)

Topaz and Chrome-Chalcedony Chemical Formula

While comparing Topaz and Chrome-Chalcedony 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 Chrome-Chalcedony chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Chrome-Chalcedony- SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)

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Topaz and Chrome-Chalcedony Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Chrome-Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Chrome-Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.55-2.70 whereas that of Chrome-Chalcedony is 2.55-2.70.