Alexandrite and Catapleiite Physical Properties

Alexandrite

Catapleiite

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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

3.69-3.812.72

1 7.18

1.5 Fracture

Not Available

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

1,1 ; 3,2.

{110} Perfect, {010} Perfect

1.7 Mohs Hardness

8.55-6

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Alexandrite and Catapleiite Chemical Formula

While comparing Alexandrite and Catapleiite 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 Catapleiite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Catapleiite- Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Alexandrite and Catapleiite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Catapleiite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Catapleiite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.72 whereas that of Catapleiite is 2.72.