Elbaite and Diaspore Physical Properties

Elbaite

Diaspore

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1 Physical Properties

1.1 Tenacity

Not Available

Very brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.10

3.30-3.40

1.5 Fracture

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

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

Poor/indistinct on {1120} and {1011}

{010} perfect, {110} distinct, {100} in traces

1.7 Mohs Hardness

6.5-7

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

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Elbaite and Diaspore Chemical Formula

While comparing Elbaite and Diaspore 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 Diaspore 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 Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Elbaite and Diaspore Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.