Gahnite and Howlite Physical Properties

Gahnite

Howlite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.00-4.622.45-2.58

1 7.18

1.5 Fracture

Conchoidal, Uneven

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

Indistinct parting on [111]

None

1.7 Mohs Hardness

7.5-83-3.5

2 10

1.8 Chemical Composition

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

Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Gahnite and Howlite Chemical Formula

While comparing Gahnite and Howlite 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 Howlite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

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Gahnite Vs Indicolite Blue Tourmaline

Gahnite and Howlite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Howlite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 2.45-2.58 whereas that of Howlite is 2.45-2.58.