Hercynite and Kyanite Physical Properties

Hercynite

Kyanite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.393.53-3.65

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Splintery, Brittle, Metallic

1.6 Cleavage

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

[100] perfect [010] imperfect with 79° angle between

1.7 Mohs Hardness

7.5-84-7

2 10

1.8 Chemical Composition

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

Not Available

Hercynite and Kyanite Chemical Formula

While comparing Hercynite and Kyanite 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 Kyanite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

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Hercynite and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.