Hercynite and Tourmaline Physical Properties

Hercynite

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

4.392.85-3.35

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{111} Indistinct, {111} Indistinct, {111} Indistinct

Indistinct

1.7 Mohs Hardness

7.5-87-7.5

2 10

1.8 Chemical Composition

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.

Hercynite and Tourmaline Chemical Formula

While comparing Hercynite and 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 Hercynite and Tourmaline chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.

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Hercynite and Tourmaline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 2.85-3.35 whereas that of Tourmaline is 2.85-3.35.