Topaz and Poudretteite Physical Properties

Topaz

Poudretteite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.49-3.572.51-2.53

1 7.18

1.5 Fracture

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

Conchoidal, Splintery

1.6 Cleavage

[001] Perfect

None

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

Topaz and Poudretteite Chemical Formula

While comparing Topaz and Poudretteite 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 Poudretteite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems for Sagittarius

Topaz Vs Pietersite

Topaz Vs Quartz Smoky

Topaz Vs Petoskey Stone

Topaz and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.