Alexandrite and Datolite Physical Properties

Alexandrite

Datolite

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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

3.69-3.812.90-3.00

1 7.18

1.5 Fracture

Not Available

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

1,1 ; 3,2.

None

1.7 Mohs Hardness

8.55-5.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Alexandrite and Datolite Chemical Formula

While comparing Alexandrite and Datolite 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 Datolite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Datolite- CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Alexandrite and Datolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Datolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Datolite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.90-3.00 whereas that of Datolite is 2.90-3.00.