Cordierite and Milarite Physical Properties

Cordierite

Milarite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.662.52-2.60

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

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

{0001} Imperfect, {1120} Imperfect

1.7 Mohs Hardness

7-7.55.5-6

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Cordierite and Milarite Chemical Formula

While comparing Cordierite and Milarite 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 Cordierite and Milarite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Milarite- KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Cordierite and Milarite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Milarite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Milarite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.52-2.60 whereas that of Milarite is 2.52-2.60.