Precious Opal and Watermelon Tourmaline Physical Properties

Precious Opal

Watermelon Tourmaline

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

1.98-2.25

Conchoidal

None

5-6.5

SiO 2 · nH 2OGemdat.org , Management Team (2012)

2.90-3.40

Uneven, Conchoidal, Irregular

Indiscernible

7-7.5

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.

Precious Opal and Watermelon Tourmaline Chemical Formula

While comparing Precious Opal and Watermelon Tourmaline 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 Precious Opal and Watermelon Tourmaline chemical formula.

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Precious Opal and Watermelon Tourmaline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Watermelon Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal Vs Watermelon Tourmaline during the identification of gemstone. Specific gravity of Precious Opal is whereas that of Watermelon Tourmaline is .