Jade and Petalite Physical Properties

Jade

Petalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.382.40

1 7.18

1.5 Fracture

Gemstones of the world (2001), Difficult, Splintery

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

1.6 Cleavage

1 or 2,2 prismatic.

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

1.7 Mohs Hardness

6-76-6.5

2 10

1.8 Chemical Composition

Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆

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

Jade and Petalite Chemical Formula

While comparing Jade 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 Jade and Petalite chemical formula.

Chemical formula of Jade- Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Jade and Petalite Specific Gravity

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