Precious Opal and Watermelon Tourmaline Physical Properties

Precious Opal

Watermelon Tourmaline

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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

1.98-2.252.90-3.40

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

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

1.6 Cleavage

Not Available

1.7 Mohs Hardness

5-6.57-7.5

2 10

1.8 Chemical Composition

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

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.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
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.

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Precious Opal Vs Sard

Precious Opal Vs Sapphire

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 and Watermelon Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 2.90-3.40 whereas that of Watermelon Tourmaline is 2.90-3.40.