Sillimanite and Diopside Physical Properties

Sillimanite

Diopside

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1 Physical Properties

1.1 Tenacity

Tough

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.263.22-3.40

1 7.18

1.5 Fracture

Splintery

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

1.6 Cleavage

{010} perfect

Distinct/good on {110}

1.7 Mohs Hardness

6-7.55-6

2 10

1.8 Chemical Composition

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

CaMgSi₂O₆

Sillimanite and Diopside Chemical Formula

While comparing Sillimanite and Diopside 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 Diopside chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Diopside- CaMgSi₂O₆

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Sillimanite and Diopside Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Diopside Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Diopside Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 3.22-3.40 whereas that of Diopside is 3.22-3.40.