Goethite and Phosphophyllite Physical Properties

Goethite

Phosphophyllite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

HCl soluble

4.27-4.29

Uneven

Perfect {010}

5-5.5

FeO(OH)Arthur Thomas , Gemstones (2009)

3.07-3.13

Conchoidal, Uneven

{100} Perfect, {010} Distinct, {102} Distinct

3-3.5

Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Goethite and Phosphophyllite Chemical Formula

While comparing Goethite and Phosphophyllite 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 Goethite and Phosphophyllite chemical formula.

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Goethite and Phosphophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Phosphophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite Vs Phosphophyllite during the identification of gemstone. Specific gravity of Goethite is whereas that of Phosphophyllite is .