Alexandrite and Cinnabar Physical Properties

Alexandrite

Cinnabar

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1 Physical Properties

1.1 Tenacity

Not Available

Slightly sectile

1.2 Solubility

Not Available

1.04 x 10⁻²⁵ g per 100 ml water (Ksp at 25°C = 2 x 10⁻³²)

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.812

1 7.18

1.5 Fracture

Not Available

Uneven, Uneven, Gemstones (2009), Brittle

1.6 Cleavage

1,1 ; 3,2.

Prismatic {10 1 0}, perfect

1.7 Mohs Hardness

8.52-2.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Alexandrite and Cinnabar Chemical Formula

While comparing Alexandrite and Cinnabar 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 Cinnabar chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Alexandrite and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2 whereas that of Cinnabar is 2.