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Zinnwaldite
Zinnwaldite

Goethite
Goethite



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Zinnwaldite
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Goethite

Zinnwaldite and Goethite Physical Properties

Physical Properties

Tenacity

Elastic
-

Solubility

-
HCl soluble

Durability

-
-

Specific Gravity

2.9-3.14.27-4.29
1 7.18
👆🏻

Fracture

Uneven
Uneven

Cleavage

Perfect basal {001}
Perfect {010}

Mohs Hardness

3.5-4.05-5.5
2 10
👆🏻

Chemical Composition

-
FeO(OH)Arthur Thomas , Gemstones (2009)

Zinnwaldite and Goethite Chemical Formula

While comparing Zinnwaldite and Goethite 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 Zinnwaldite and Goethite chemical formula.

  • Chemical formula of Zinnwaldite- -
  • Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

Zinnwaldite and Goethite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zinnwaldite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zinnwaldite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Zinnwaldite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.