Dumortierite and Ettringite Physical Properties

Dumortierite

Ettringite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

3.26-3.411.77

1 7.18

1.5 Fracture

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

Not Available

1.6 Cleavage

Distinct on {100}, poor on {110}; parting on {001}

Perfect on {10 1 0}

1.7 Mohs Hardness

7-8.52-2.5

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Dumortierite and Ettringite Chemical Formula

While comparing Dumortierite and Ettringite 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 Dumortierite and Ettringite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Dumortierite and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dumortierite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 1.77 whereas that of Ettringite is 1.77.