Elbaite and Dumortierite Physical Properties

Elbaite

Dumortierite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.10

3.26-3.41

1.5 Fracture

Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

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

1.6 Cleavage

Poor/indistinct on {1120} and {1011}

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

1.7 Mohs Hardness

7-8.5

1.8 Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references

AlAl₆O₃BSi₃O₁₈

Elbaite and Dumortierite Chemical Formula

While comparing Elbaite 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 Elbaite and Dumortierite chemical formula.

Chemical formula of Elbaite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Elbaite and Dumortierite Specific Gravity

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