Spinel and Indicolite Blue Tourmaline Physical Properties

Spinel

Indicolite Blue Tourmaline

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.663.05-3.11

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

Not Available

1.6 Cleavage

None, but may exhibit slight parting

Not Available

1.7 Mohs Hardness

87-7.5

2 10

1.8 Chemical Composition

MgAl₂O₄

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.

Spinel and Indicolite Blue Tourmaline Chemical Formula

While comparing Spinel 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 Spinel and Indicolite Blue Tourmaline chemical formula.

Chemical formula of Spinel- MgAl₂O₄
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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Spinel and Indicolite Blue Tourmaline Specific Gravity

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