Petalite and Fayalite Physical Properties

Petalite

Fayalite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.404.392

1 7.18

2.5 Fracture

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

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

2.6 Cleavage

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

{010} moderate, {100} imperfect

2.7 Mohs Hardness

6-6.56.5-7

2 10

2.11 Chemical Composition

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

Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Petalite and Fayalite Chemical Formula

While comparing Petalite and Fayalite 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 Fayalite chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems Found In Australia

Petalite Vs Sapphire

Petalite Vs Scheelite

Petalite Vs Scolecite

Petalite and Fayalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 4.392 whereas that of Fayalite is 4.392.