Gahnite and Achroite Physical Properties

Gahnite

Achroite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.00-4.622.90-3.40

1 7.18

1.5 Fracture

Conchoidal, Uneven

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Indistinct parting on [111]

Not Available

1.7 Mohs Hardness

7.5-87-7.5

2 10

1.8 Chemical Composition

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Gahnite and Achroite Chemical Formula

While comparing Gahnite and Achroite 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 Gahnite and Achroite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Compare Blue Gemstones

Gahnite Vs Howlite

Gahnite Vs Hydrogrossular

Gahnite Vs Indicolite Blue Tourmaline

Gahnite and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Achroite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 2.90-3.40 whereas that of Achroite is 2.90-3.40.