Datolite and Alunite Physical Properties

Datolite

Alunite

Add ⊕

1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.002.6-2.9

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic

Conchoidal, Uneven

1.6 Cleavage

None

On {0001}, perfect

1.7 Mohs Hardness

5-5.53.5-4

2 10

1.8 Chemical Composition

CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

KAl3(SO4)2(OH)6

Datolite and Alunite Chemical Formula

While comparing Datolite 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 Datolite and Alunite chemical formula.

Chemical formula of Datolite- CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Alunite- KAl3(SO4)2(OH)6

Compare Green Gemstones

Datolite Vs Euclase

Datolite Vs Elaeolite

Datolite Vs Emerald

Datolite and Alunite Specific Gravity

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