Alexandrite and Londonite Physical Properties

Alexandrite

Londonite

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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

3.69-3.813.34

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

1,1 ; 3,2.

None

1.7 Mohs Hardness

8.5Not Available

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)

Alexandrite and Londonite Chemical Formula

While comparing Alexandrite and Londonite 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 Londonite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)

Compare Gems for Scorpio

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Alexandrite Vs Gahnospinel

Alexandrite and Londonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Londonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Londonite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.34 whereas that of Londonite is 3.34.