Creedite and Anhydrite Physical Properties

Creedite

Anhydrite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.702.90-2.98

1 7.18

1.5 Fracture

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

Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

Perfect on {100}

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

1.7 Mohs Hardness

4.53.5

2 10

1.8 Chemical Composition

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

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Creedite and Anhydrite Chemical Formula

While comparing Creedite and Anhydrite 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 Anhydrite chemical formula.

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

Compare Colorless Gems

Creedite Vs Dravite

Creedite Vs Diopside

Creedite Vs Diaspore

Creedite and Anhydrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Creedite and Anhydrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Creedite and Anhydrite Optical Properties during the identification of gemstone. Specific gravity of Creedite is 2.90-2.98 whereas that of Anhydrite is 2.90-2.98.