Phenakite and Petalite Physical Properties

Phenakite

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

2.90-2.982.40

1 7.18

1.5 Fracture

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle

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

1.6 Cleavage

Distinct on {11 2 0}, imperfect on {10 1 1}

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

1.7 Mohs Hardness

7.5-86-6.5

2 10

1.8 Chemical Composition

Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Phenakite and Petalite Chemical Formula

While comparing Phenakite 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 Phenakite and Petalite chemical formula.

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

Compare Colorless Gems

Phenakite Vs Pyromorphite

Phenakite Vs Quartz

Phenakite Vs Prase Opal

Phenakite and Petalite Specific Gravity

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