Gedrite and Alunite Physical Properties

Gedrite

Alunite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.15-3.259

Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.

5.5-6

(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Brittle

Soluble

2.6-2.9

Conchoidal, Uneven

On {0001}, perfect

3.5-4

KAl3(SO4)2(OH)6

Gedrite and Alunite Chemical Formula

While comparing Gedrite and Alunite 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 Gedrite and Alunite chemical formula.

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Gedrite and Alunite Specific Gravity

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