Watermelon Tourmaline and Onyx Physical Properties

Watermelon Tourmaline

Onyx

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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

2.90-3.402.55-2.70

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

Not Available

Indiscernible

1.7 Mohs Hardness

7-7.56.5-7

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.

SiO₂

Watermelon Tourmaline and Onyx Chemical Formula

While comparing Watermelon Tourmaline and Onyx 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 Onyx 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 Onyx- SiO₂

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Watermelon Tourmaline and Onyx Specific Gravity

Another important criteria for qualitative analysis of gemstones is Watermelon Tourmaline and Onyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Watermelon Tourmaline and Onyx Optical Properties during the identification of gemstone. Specific gravity of Watermelon Tourmaline is 2.55-2.70 whereas that of Onyx is 2.55-2.70.