Hyacinth and Alexandrite Physical Properties

Hyacinth

Alexandrite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.93-4.733.69-3.81

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Not Available

1.6 Cleavage

Not Available

1,1 ; 3,2.

1.7 Mohs Hardness

6.5-7.58.5

2 10

1.8 Chemical Composition

ZrSiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

BeAl ₂ O ₄

Hyacinth and Alexandrite Chemical Formula

While comparing Hyacinth 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 Hyacinth and Alexandrite chemical formula.

Chemical formula of Hyacinth- ZrSiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Hyacinth and Alexandrite Specific Gravity

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