Pollucite and Tanzanite Physical Properties

Pollucite

Tanzanite

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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

2.86-2.943.35

1 7.18

1.5 Fracture

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

Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

None observed

Perfect {010}, imperfect {100}

1.7 Mohs Hardness

6.5-76.5-7

2 10

1.8 Chemical Composition

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

Ca₂Al₃(SiO₄)₃(OH)

Pollucite and Tanzanite Chemical Formula

While comparing Pollucite and Tanzanite 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 Tanzanite 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 Tanzanite- Ca₂Al₃(SiO₄)₃(OH)

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Pollucite and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pollucite and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 3.35 whereas that of Tanzanite is 3.35.