Alexandrite and Creedite Physical Properties

Alexandrite

Creedite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.812.70

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

1,1 ; 3,2.

Perfect on {100}

1.7 Mohs Hardness

8.54.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

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

Alexandrite and Creedite Chemical Formula

While comparing Alexandrite and Creedite 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 Alexandrite and Creedite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

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Alexandrite and Creedite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Creedite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Creedite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.70 whereas that of Creedite is 2.70.