Creedite and Petalite Physical Properties

Creedite

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

2.702.40

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

Perfect on {100}

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

1.7 Mohs Hardness

4.56-6.5

2 10

1.8 Chemical Composition

Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

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

Creedite and Petalite Chemical Formula

While comparing Creedite 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 Creedite and Petalite chemical formula.

Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Colorless Gems

Creedite Vs Dravite

Creedite Vs Diopside

Creedite Vs Diaspore

Creedite and Petalite Specific Gravity

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