Topaz and Amazonite Physical Properties

Topaz

Amazonite

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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

2.55-2.57

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

[001] Perfect

2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal

1.7 Mohs Hardness

6-6.5

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

KAlSi₃O₈

Topaz and Amazonite Chemical Formula

While comparing Topaz and Amazonite 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 Amazonite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Amazonite- KAlSi₃O₈

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Topaz and Amazonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Amazonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Amazonite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.55-2.57 whereas that of Amazonite is 2.55-2.57.