Poudretteite and Thulite Physical Properties

Poudretteite

Thulite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.51-2.533.1

1 7.18

1.5 Fracture

Conchoidal, Splintery

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None

Perfect {010} imperfect {100}

1.7 Mohs Hardness

56-7

2 10

1.8 Chemical Composition

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

Ca₂Al₃(SiO₄)₃(OH)

Poudretteite and Thulite Chemical Formula

While comparing Poudretteite and Thulite 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 Poudretteite and Thulite chemical formula.

Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Thulite- Ca₂Al₃(SiO₄)₃(OH)

Compare Violet Gemstones

Poudretteite Vs Sapphire

Poudretteite Vs Rutilated Quartz

Poudretteite Vs Rubellite

Poudretteite and Thulite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Poudretteite and Thulite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poudretteite and Thulite Optical Properties during the identification of gemstone. Specific gravity of Poudretteite is 3.1 whereas that of Thulite is 3.1.