Alexandrite and Hibonite Physical Properties

Alexandrite

Hibonite

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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

3.69-3.813.84

1 7.18

1.5 Fracture

Not Available

Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

1.6 Cleavage

1,1 ; 3,2.

{0001} good, {10 1 0} parting

1.7 Mohs Hardness

8.57.5-8

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

(Ca,Ce)(Al,Ti,Mg)12O19

Alexandrite and Hibonite Chemical Formula

While comparing Alexandrite and Hibonite 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 Hibonite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19

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Alexandrite and Hibonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Hibonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Hibonite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.84 whereas that of Hibonite is 3.84.