Moonstone and Petalite Physical Properties

Moonstone

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

2.56-2.602.40

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal

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

1.7 Mohs Hardness

6-6.56-6.5

2 10

1.8 Chemical Composition

Plagioclase Feldspar s: (Na,Ca)Al_1-2Si_3-2O₈ Orthoclase Feldspar : KAlSi₃O₈

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

Moonstone and Petalite Chemical Formula

While comparing Moonstone 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 Moonstone and Petalite chemical formula.

Chemical formula of Moonstone- Plagioclase Feldspar s: (Na,Ca)Al_1-2Si_3-2O₈ Orthoclase Feldspar : KAlSi₃O₈
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Semi Precious Gemstones

Moonstone Vs Alexandrite

Moonstone Vs Lehsunia

Moonstone Vs Peridot

Moonstone and Petalite Specific Gravity

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