Petalite and Anorthite Physical Properties

Petalite

Anorthite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.40

2.77

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

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

Perfect [001] good [010] poor [110]

1.7 Mohs Hardness

6-6.5

1.8 Chemical Composition

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

CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Petalite and Anorthite Chemical Formula

While comparing Petalite and Anorthite 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 Petalite and Anorthite chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems Found In Australia

Petalite Vs Scheelite

Petalite Vs Scolecite

Petalite Vs Sapphire

Petalite and Anorthite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Anorthite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Anorthite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 2.77 whereas that of Anorthite is 2.77.