Hercynite and Legrandite Physical Properties

Hercynite

Legrandite

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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

4.393.98-4.04

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

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

Imperfect, poor one {100}

1.7 Mohs Hardness

7.5-84.5-5

2 10

1.8 Chemical Composition

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

Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Hercynite and Legrandite Chemical Formula

While comparing Hercynite and Legrandite 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 Legrandite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Hercynite and Legrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Legrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Legrandite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.98-4.04 whereas that of Legrandite is 3.98-4.04.