Ettringite and Dumortierite Physical Properties

Ettringite

Dumortierite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partially soluble in water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.773.26-3.41

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Perfect on {10 1 0}

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

1.7 Mohs Hardness

2-2.57-8.5

2 10

1.8 Chemical Composition

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

AlAl₆O₃BSi₃O₁₈

Ettringite and Dumortierite Chemical Formula

While comparing Ettringite and Dumortierite 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 Ettringite and Dumortierite chemical formula.

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

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Ettringite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.