Sillimanite and Cordierite Iolite Physical Properties

Sillimanite

Cordierite Iolite

Add ⊕

1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.262.56-2.66

1 7.18

1.5 Fracture

Splintery

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

{010} perfect

Not Available

1.7 Mohs Hardness

6-7.57-7.5

2 10

1.8 Chemical Composition

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

Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.

Sillimanite and Cordierite Iolite Chemical Formula

While comparing Sillimanite and Cordierite Iolite 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 Cordierite Iolite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.

Compare Blue Gemstones

Sillimanite Vs Starlite

Sillimanite Vs Strontium Titanate

Sillimanite Vs Tanzanite

Sillimanite and Cordierite Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Cordierite Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Cordierite Iolite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.56-2.66 whereas that of Cordierite Iolite is 2.56-2.66.