Pectolite and Petalite Physical Properties

Pectolite

Petalite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.74-2.902.40

1 7.18

1.5 Fracture

Uneven, Gemstones (2009), Splintery

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

1.6 Cleavage

Perfect on {100} and {001}

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

1.7 Mohs Hardness

4.5-56-6.5

2 10

1.8 Chemical Composition

Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

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

Pectolite and Petalite Chemical Formula

While comparing Pectolite 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 Pectolite and Petalite chemical formula.

Chemical formula of Pectolite- Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Colorless Gems

Pectolite Vs Phosphophyllite

Pectolite Vs Pleonaste

Pectolite Vs Phosphosiderite

Pectolite and Petalite Specific Gravity

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