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Verdelite
Verdelite

Sylvite
Sylvite



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Verdelite
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Sylvite

Verdelite and Sylvite Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

2.90-3.401.993
1 7.18
👆🏻

Fracture

Conchoidal
Uneven

Cleavage

Indiscernible
Perfect on [100], [010], [001]

Mohs Hardness

7-7.52.5
2 10
👆🏻

Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
KCl

Verdelite and Sylvite Chemical Formula

While comparing Verdelite 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 Verdelite and Sylvite chemical formula.

  • Chemical formula of Verdelite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
  • Chemical formula of Sylvite- KCl

Verdelite and Sylvite Specific Gravity

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