Diopside and Sillimanite Physical Properties

Diopside

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.22-3.403.20-3.26

1 7.18

1.5 Fracture

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

Splintery

1.6 Cleavage

Distinct/good on {110}

{010} perfect

1.7 Mohs Hardness

5-66-7.5

2 10

1.8 Chemical Composition

CaMgSi₂O₆

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

Diopside and Sillimanite Chemical Formula

While comparing Diopside 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 Diopside and Sillimanite chemical formula.

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

Compare Yellow Gemstones

Diopside Vs Feldspar

Diopside Vs Fayalite

Diopside Vs Ettringite

Diopside and Sillimanite Specific Gravity

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