Jade and Polyhalite Physical Properties

Jade

Polyhalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.382.78

1 7.18

1.5 Fracture

Gemstones of the world (2001), Difficult, Splintery

Conchoidal, Brittle

1.6 Cleavage

1 or 2,2 prismatic.

Perfect on {10 1 }; parting on {010}

1.7 Mohs Hardness

6-73.5

2 10

1.8 Chemical Composition

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

Not Available

Jade and Polyhalite Chemical Formula

While comparing Jade and Polyhalite 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 Polyhalite chemical formula.

Chemical formula of Jade- Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆

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Jade and Polyhalite Specific Gravity

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