Topaz and Indicolite Blue Tourmaline Physical Properties

Topaz

Indicolite Blue 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

3.49-3.573.05-3.11

1 7.18

1.5 Fracture

Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Not Available

1.6 Cleavage

[001] Perfect

Not Available

1.7 Mohs Hardness

87-7.5

2 10

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

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.

Topaz and Indicolite Blue Tourmaline Chemical Formula

While comparing Topaz and Indicolite Blue 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 Topaz and Indicolite Blue Tourmaline chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Indicolite Blue 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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Topaz and Indicolite Blue Tourmaline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Indicolite Blue Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Indicolite Blue Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Topaz is 3.05-3.11 whereas that of Indicolite Blue Tourmaline is 3.05-3.11.