Sillimanite and Jade Physical Properties

Sillimanite

Jade

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.262.90-3.38

1 7.18

1.5 Fracture

Splintery

Gemstones of the world (2001), Difficult, Splintery

1.6 Cleavage

{010} perfect

1 or 2,2 prismatic.

1.7 Mohs Hardness

6-7.56-7

2 10

1.8 Chemical Composition

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

Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆

Sillimanite and Jade Chemical Formula

While comparing Sillimanite and Jade 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 Sillimanite and Jade chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Jade- Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆

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Sillimanite and Jade Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Jade Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Jade Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.90-3.38 whereas that of Jade is 2.90-3.38.