Amblygonite and Alunite Physical Properties

Amblygonite

Alunite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.98-3.102.6-2.9

1 7.18

1.5 Fracture

Sub-Conchoidal, Irregular/uneven, Sub-Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, Uneven

1.6 Cleavage

[100] Perfect, [110] Good, [011] Distinct

On {0001}, perfect

1.7 Mohs Hardness

63.5-4

2 10

1.8 Chemical Composition

(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

KAl3(SO4)2(OH)6

Amblygonite and Alunite Chemical Formula

While comparing Amblygonite 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 Amblygonite and Alunite chemical formula.

Chemical formula of Amblygonite- (Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Alunite- KAl3(SO4)2(OH)6

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Amblygonite and Alunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Amblygonite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Amblygonite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Amblygonite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.