Pollucite and Emerald Physical Properties

Pollucite

Emerald

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Readily soluble in HF

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

2.86-2.942.67-2.78

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

None observed

Imperfect on the [0001]

1.7 Mohs Hardness

6.5-77.5-8

2 10

1.8 Chemical Composition

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

Be₃Al₂SiO₆

Pollucite and Emerald Chemical Formula

While comparing Pollucite and Emerald 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 Pollucite and Emerald chemical formula.

Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Emerald- Be₃Al₂SiO₆

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Pollucite and Emerald Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pollucite and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Emerald Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 2.67-2.78 whereas that of Emerald is 2.67-2.78.