Elbaite and Sapphire Physical Properties

Elbaite

Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.10

3.95-4.03

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

Poor/indistinct on {1120} and {1011}

None, but may exhibit parting

1.7 Mohs Hardness

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

Al ₂ O ₃

Elbaite and Sapphire Chemical Formula

While comparing Elbaite and Sapphire 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 Sapphire 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 Sapphire- Al ₂ O ₃

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Elbaite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.