Hercynite and Ajoite Physical Properties

Hercynite

Ajoite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Decomposed by acids

1.3 Durability

Not Available

1.4 Specific Gravity

4.392.96

1 7.18

2.5 Fracture

ConchoidalGemdat.org, Uneven

Not Available

2.6 Cleavage

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

Perfect on {010}

2.7 Mohs Hardness

7.5-85

2 10

3.3 Chemical Composition

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

(K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O)

Hercynite and Ajoite Chemical Formula

While comparing Hercynite and Ajoite 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 Ajoite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Ajoite- (K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O)

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Hercynite and Ajoite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Ajoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Ajoite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 2.96 whereas that of Ajoite is 2.96.