Clinozoisite and Alexandrite Physical Properties

Clinozoisite

Alexandrite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.21-3.38

3.69-3.81

1.5 Fracture

Irregular/uneven, Uneven

Not Available

1.6 Cleavage

Perfect on {001}

1,1 ; 3,2.

1.7 Mohs Hardness

6-7

8.5

1.8 Chemical Composition

Ca 2Al 3(SiO 4) 3(OH)Walter Schumann , Gemstones of the world (2001) More from other references

BeAl ₂ O ₄

Clinozoisite and Alexandrite Chemical Formula

While comparing Clinozoisite 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 Clinozoisite and Alexandrite chemical formula.

Chemical formula of Clinozoisite- Ca 2Al 3(SiO 4) 3(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Clinozoisite and Alexandrite Specific Gravity

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