Alexandrite and Hardystonite Physical Properties

Alexandrite

Hardystonite

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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

3.69-3.813.396-3.443

1 7.18

1.5 Fracture

Not Available

Brittle, Metallic

1.6 Cleavage

1,1 ; 3,2.

[001] good, [100] and [110] fair

1.7 Mohs Hardness

8.53-4

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Alexandrite and Hardystonite Chemical Formula

While comparing Alexandrite and Hardystonite 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 Hardystonite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Compare Gems for Scorpio

Alexandrite Vs Citrine

Alexandrite Vs Fluorite

Alexandrite Vs Gahnospinel

Alexandrite and Hardystonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.