Variscite and Sillimanite Physical Properties

Variscite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.42-2.583.20-3.26

1 7.18

1.5 Fracture

Conchoidal, Splintery, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle

Splintery

1.6 Cleavage

[010] perfect

{010} perfect

1.7 Mohs Hardness

4-56-7.5

2 10

1.8 Chemical Composition

AlPO₄ · 2(H₂O)

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Variscite and Sillimanite Chemical Formula

While comparing Variscite and Sillimanite 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 Variscite and Sillimanite chemical formula.

Chemical formula of Variscite- AlPO₄ · 2(H₂O)
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems for Virgo

Variscite Vs Amazonite

Variscite Vs Aragonite

Variscite Vs Garnet

Variscite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Variscite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Variscite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Variscite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.