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Goethite
Goethite

Kainite
Kainite



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Goethite
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Kainite

Goethite and Kainite Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

HCl soluble
Soluble

Durability

-
-

Specific Gravity

4.27-4.292.15
1 7.18
👆🏻

Fracture

Uneven
Splintery, Conchoidal

Cleavage

Perfect {010}
{001}, perfect

Mohs Hardness

5-5.52.5-3
2 10
👆🏻

Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)
KMg(SO4)Cl

Goethite and Kainite Chemical Formula

While comparing Goethite and Kainite 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 Kainite chemical formula.

  • Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
  • Chemical formula of Kainite- KMg(SO4)Cl

Goethite and Kainite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Kainite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Kainite Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.15 whereas that of Kainite is 2.15.