Andradite Garnet and Petalite Physical Properties

Andradite Garnet

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

3.8-3.92.40

1 7.18

1.5 Fracture

Not Available

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

6.5-7.56-6.5

2 10

1.8 Chemical Composition

Ca₃Fe³⁺₂Si₃O₁₂

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

Andradite Garnet and Petalite Chemical Formula

While comparing Andradite Garnet 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 Andradite Garnet and Petalite chemical formula.

Chemical formula of Andradite Garnet- Ca₃Fe³⁺₂Si₃O₁₂
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Andradite Garnet Vs Rutilated topaz

Andradite Garnet Vs Lemon quartz

Andradite Garnet and Petalite Specific Gravity

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