Creedite and Periclase Physical Properties

Creedite

Periclase

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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

2.703.7-3.9

1 7.18

1.5 Fracture

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

Conchoidal, Brittle

1.6 Cleavage

Perfect on {100}

{001} perfect; {111} imperfect, may exhibit parting on , {011}

1.7 Mohs Hardness

4.55.5-6

2 10

1.8 Chemical Composition

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

MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

Creedite and Periclase Chemical Formula

While comparing Creedite and Periclase 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 Periclase chemical formula.

Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.
Chemical formula of Periclase- MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Colorless Gems

Creedite Vs Dravite

Creedite Vs Diopside

Creedite Vs Diaspore

Creedite and Periclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Creedite and Periclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Creedite and Periclase Optical Properties during the identification of gemstone. Specific gravity of Creedite is 3.7-3.9 whereas that of Periclase is 3.7-3.9.