Alunite and Chrysocolla Physical Properties

Alunite

Chrysocolla

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.92.00-2.45

1 7.18

1.5 Fracture

Conchoidal, Uneven

Sub-Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

On {0001}, perfect

none

1.7 Mohs Hardness

3.5-42-4

2 10

1.8 Chemical Composition

KAl3(SO4)2(OH)6

Cu₂H₂Si₂O₅(OH)₄

Alunite and Chrysocolla Chemical Formula

While comparing Alunite and Chrysocolla 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 Chrysocolla chemical formula.

Chemical formula of Alunite- KAl3(SO4)2(OH)6
Chemical formula of Chrysocolla- Cu₂H₂Si₂O₅(OH)₄

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Alunite and Chrysocolla Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Chrysocolla Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Chrysocolla Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.00-2.45 whereas that of Chrysocolla is 2.00-2.45.