Rosasite and Petalite Physical Properties

Rosasite

Petalite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Effervesces in cold

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

4-4.22.40

1 7.18

1.5 Fracture

Splintery

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

1.6 Cleavage

Perfect on {100} and {010}

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

1.7 Mohs Hardness

46-6.5

2 10

1.8 Chemical Composition

Not Available

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

Rosasite and Petalite Chemical Formula

While comparing Rosasite 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 Rosasite and Petalite chemical formula.

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

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Rosasite and Petalite Specific Gravity

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