Alunite and Jade Physical Properties

Alunite

Jade

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.92.90-3.38

1 7.18

1.5 Fracture

Conchoidal, Uneven

Gemstones of the world (2001), Difficult, Splintery

1.6 Cleavage

On {0001}, perfect

1 or 2,2 prismatic.

1.7 Mohs Hardness

3.5-46-7

2 10

1.8 Chemical Composition

KAl3(SO4)2(OH)6

Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆

Alunite and Jade Chemical Formula

While comparing Alunite and Jade 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 Alunite and Jade chemical formula.

Chemical formula of Alunite- KAl3(SO4)2(OH)6
Chemical formula of Jade- Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆

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Alunite and Jade Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Jade Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Jade Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.90-3.38 whereas that of Jade is 2.90-3.38.