Tanzanite and Petalite Physical Properties

Tanzanite

Petalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

3.352.40

1 7.18

1.5 Fracture

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

Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal

1.6 Cleavage

Perfect {010}, imperfect {100}

Perfect on {001}, poor on {201} with 38.5° angle between the two

1.7 Mohs Hardness

6.5-76-6.5

2 10

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Tanzanite and Petalite Chemical Formula

While comparing Tanzanite and Petalite 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 Tanzanite and Petalite chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Semi Precious Gemstones

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Tanzanite Vs Amethyst

Tanzanite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 2.40 whereas that of Petalite is 2.40.