Alexandrite and Anhydrite Physical Properties

Alexandrite

Anhydrite

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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

3.69-3.812.90-2.98

1 7.18

1.5 Fracture

Not Available

Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

1,1 ; 3,2.

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

1.7 Mohs Hardness

8.53.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Alexandrite and Anhydrite Chemical Formula

While comparing Alexandrite and Anhydrite 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 Anhydrite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Alexandrite and Anhydrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Anhydrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Anhydrite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.90-2.98 whereas that of Anhydrite is 2.90-2.98.