Shigaite and Alexandrite Physical Properties

Shigaite

Alexandrite

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1 Physical Properties

1.1 Tenacity

Moderately ﬂexible

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.323.69-3.81

1 7.18

1.5 Fracture

Flexible Flexible fragments.

Not Available

1.6 Cleavage

Perfect on {0001}

1,1 ; 3,2.

1.7 Mohs Hardness

28.5

2 10

1.8 Chemical Composition

Not Available

BeAl ₂ O ₄

Shigaite and Alexandrite Chemical Formula

While comparing Shigaite and Alexandrite 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 Shigaite and Alexandrite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄

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Shigaite and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Shigaite and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Shigaite and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Shigaite is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.