Gahnite and Pollucite Physical Properties

Gahnite

Pollucite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Readily soluble in HF

1.3 Durability

Not Available

1.4 Specific Gravity

4.00-4.622.86-2.94

1 7.18

1.5 Fracture

Conchoidal, Uneven

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

1.6 Cleavage

Indistinct parting on [111]

None observed

1.7 Mohs Hardness

7.5-86.5-7

2 10

1.8 Chemical Composition

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

(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Gahnite and Pollucite Chemical Formula

While comparing Gahnite and Pollucite 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 Pollucite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Compare Blue Gemstones

Gahnite Vs Indicolite Blue Tourmaline

Gahnite Vs Howlite

Gahnite Vs Hydrogrossular

Gahnite and Pollucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.