Corundum and Datolite Physical Properties

Corundum

Datolite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.052.90-3.00

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Difficult, Fibrous

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

None – parting in 3 directions

None

1.7 Mohs Hardness

95-5.5

2 10

1.8 Chemical Composition

Al 2O 3Arthur Thomas , Gemstones (2009)

CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Corundum and Datolite Chemical Formula

While comparing Corundum and Datolite 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 Corundum and Datolite chemical formula.

Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Datolite- CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Corundum and Datolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Datolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Datolite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.90-3.00 whereas that of Datolite is 2.90-3.00.