Alexandrite and Hematite Physical Properties

Alexandrite

Hematite

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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

3.69-3.815.00-5.30

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

1,1 ; 3,2.

None, may show partings on {0001} and {10 1 1}

1.7 Mohs Hardness

8.56

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

Fe 2O 3Arthur Thomas , Gemstones (2009)

Alexandrite and Hematite Chemical Formula

While comparing Alexandrite and Hematite 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 Hematite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)

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Alexandrite and Hematite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Hematite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Hematite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 5.00-5.30 whereas that of Hematite is 5.00-5.30.