Creedite and Rock Crystal Physical Properties

Creedite

Rock Crystal

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.702.65

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

Perfect on {100}

Not Available

1.7 Mohs Hardness

4.57

2 10

1.8 Chemical Composition

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

SiO 2Walter Schumann , Gemstones of the world (2001)

Creedite and Rock Crystal Chemical Formula

While comparing Creedite and Rock Crystal 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 Rock Crystal chemical formula.

Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.
Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)

Compare Colorless Gems

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Creedite Vs Dravite

Creedite and Rock Crystal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Creedite and Rock Crystal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Creedite and Rock Crystal Optical Properties during the identification of gemstone. Specific gravity of Creedite is 2.65 whereas that of Rock Crystal is 2.65.