Watermelon Tourmaline and Corundum Physical Properties

Watermelon Tourmaline

Corundum

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.403.90-4.05

1 7.18

1.5 Fracture

Uneven, Conchoidal, Uneven, Irregular, Conchoidal, Management Team (2012)

Uneven, Uneven, Gems, Difficult, Fibrous

1.6 Cleavage

Not Available

None – parting in 3 directions

1.7 Mohs Hardness

7-7.59

2 10

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) Formula given for elbaite.

Al 2O 3Arthur Thomas , Gemstones (2009)

Watermelon Tourmaline and Corundum Chemical Formula

While comparing Watermelon Tourmaline and Corundum 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 Watermelon Tourmaline and Corundum chemical formula.

Chemical formula of Watermelon Tourmaline- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)

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Watermelon Tourmaline and Corundum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Watermelon Tourmaline and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Watermelon Tourmaline and Corundum Optical Properties during the identification of gemstone. Specific gravity of Watermelon Tourmaline is 3.90-4.05 whereas that of Corundum is 3.90-4.05.