Rossmanite and Cordierite Physical Properties

Rossmanite

Cordierite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

32.57-2.66

1 7.18

1.5 Fracture

Brittle, Metallic

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

None

Fair on {100}, poor on {001} and {010}

1.7 Mohs Hardness

Not Available7-7.5

2 10

1.8 Chemical Composition

◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Mg2Al4Si5O18

Rossmanite and Cordierite Chemical Formula

While comparing Rossmanite and Cordierite 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 Rossmanite and Cordierite chemical formula.

Chemical formula of Rossmanite- ◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Cordierite- Mg2Al4Si5O18

Compare Gems Found in America

Rossmanite Vs Serandite

Rossmanite Vs Serpentine

Rossmanite Vs Scolecite

Rossmanite and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rossmanite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rossmanite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Rossmanite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.