Hercynite and Hurlbutite Physical Properties

Hercynite

Hurlbutite

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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

4.392.90

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

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

None

1.7 Mohs Hardness

7.5-86

2 10

1.8 Chemical Composition

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

CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Hercynite and Hurlbutite Chemical Formula

While comparing Hercynite and Hurlbutite 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 Hurlbutite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Hurlbutite- CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Hercynite and Hurlbutite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Hurlbutite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Hurlbutite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 2.90 whereas that of Hurlbutite is 2.90.