Alexandrite and Humite Physical Properties

Alexandrite

Humite

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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

3.69-3.813.20-3.32

1 7.18

1.7 Fracture

Not Available

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal

1.8 Cleavage

1,1 ; 3,2.

Poor

1.9 Mohs Hardness

8.56-6.5

2 10

1.13 Chemical Composition

BeAl ₂ O ₄

(Mg,Fe2+ ) 7(SiO 4) 3(F,OH) 2Anthony et al , Handbook of mineralogy (2001)

Alexandrite and Humite Chemical Formula

While comparing Alexandrite and Humite 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 Humite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Humite- (Mg,Fe2+ ) 7(SiO 4) 3(F,OH) 2Anthony et al , Handbook of mineralogy (2001)

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Alexandrite and Humite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Humite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Humite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.20-3.32 whereas that of Humite is 3.20-3.32.