Pleonaste and Topaz Physical Properties

Pleonaste

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

3.803.49-3.57

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

[001] Perfect

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

(Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)

Al₂SiO₄(F,OH)₂

Pleonaste and Topaz Chemical Formula

While comparing Pleonaste 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 Pleonaste and Topaz chemical formula.

Chemical formula of Pleonaste- (Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

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Pleonaste and Topaz Specific Gravity

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