Bustamite and Alunite Physical Properties

Bustamite

Alunite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Partly soluble in HCl.

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.432.6-2.9

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, Uneven

1.6 Cleavage

{100} perfect; {110} and {1 1 0} good; {010} poor

On {0001}, perfect

1.7 Mohs Hardness

5.5-63.5-4

2 10

1.8 Chemical Composition

(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

KAl3(SO4)2(OH)6

Bustamite and Alunite Chemical Formula

While comparing Bustamite 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 Bustamite and Alunite chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Alunite- KAl3(SO4)2(OH)6

Compare Red Gemstones

Bustamite Vs Chambersite

Bustamite Vs Chrome-Chalcedony

Bustamite Vs Chondrodite

Bustamite and Alunite Specific Gravity

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