Anhydrite and Dumortierite Physical Properties

Anhydrite

Dumortierite

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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

2.90-2.983.26-3.41

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

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

1.6 Cleavage

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

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

1.7 Mohs Hardness

3.57-8.5

2 10

1.8 Chemical Composition

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

AlAl₆O₃BSi₃O₁₈

Anhydrite and Dumortierite Chemical Formula

While comparing Anhydrite 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 Anhydrite and Dumortierite chemical formula.

Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Anhydrite and Dumortierite Specific Gravity

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