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Poudretteite
Poudretteite

Sylvite
Sylvite



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Poudretteite
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Sylvite

Poudretteite and Sylvite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

2.51-2.531.993
1 7.18
👆🏻

Fracture

Conchoidal, Splintery
Uneven

Cleavage

None
Perfect on [100], [010], [001]

Mohs Hardness

52.5
2 10
👆🏻

Chemical Composition

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

Poudretteite and Sylvite Chemical Formula

While comparing Poudretteite and Sylvite 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 Sylvite chemical formula.

  • Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Sylvite- KCl

Poudretteite and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Poudretteite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poudretteite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Poudretteite is 1.993 whereas that of Sylvite is 1.993.