Lawsonite and Petalite Physical Properties

Lawsonite

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

3.092.40

1 7.18

1.5 Fracture

White, Yellow, Pale blue, Brittle, Uneven

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

1.6 Cleavage

Perfect on {100} and {010}, imperfect on {101}

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

1.7 Mohs Hardness

86-6.5

2 10

1.8 Chemical Composition

Not Available

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

Lawsonite and Petalite Chemical Formula

While comparing Lawsonite 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 Lawsonite and Petalite chemical formula.

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

Compare Blue Gemstones

Lawsonite Vs Sulfur

Lawsonite Vs Sylvite

Lawsonite Vs Paraiba

Lawsonite and Petalite Specific Gravity

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