Diaspore and Pollucite Physical Properties

Diaspore

Pollucite

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1 Physical Properties

1.1 Tenacity

Very brittle

Brittle

1.2 Solubility

insoluble

Readily soluble in HF

1.3 Durability

Not Available

1.4 Specific Gravity

3.30-3.402.86-2.94

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal

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

1.6 Cleavage

{010} perfect, {110} distinct, {100} in traces

None observed

1.7 Mohs Hardness

6.5-76.5-7

2 10

1.8 Chemical Composition

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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

Diaspore and Pollucite Chemical Formula

While comparing Diaspore 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 Diaspore and Pollucite chemical formula.

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

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Diaspore and Pollucite Specific Gravity

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