Grossular and Petalite Physical Properties

Grossular

Petalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.55-3.732.40

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

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

1.6 Cleavage

none

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

1.7 Mohs Hardness

7-7.56-6.5

2 10

1.8 Chemical Composition

Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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

Grossular and Petalite Chemical Formula

While comparing Grossular 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 Grossular and Petalite chemical formula.

Chemical formula of Grossular- Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Green Gemstones

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Grossular Vs Hurlbutite

Grossular and Petalite Specific Gravity

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