Carletonite and Alexandrite Physical Properties

Carletonite

Alexandrite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.45

3.69-3.81

1.5 Fracture

Conchoidal, Conchoidal, Brittle

Not Available

1.6 Cleavage

Perfect on {001}, good on {110}

1,1 ; 3,2.

1.7 Mohs Hardness

4-4.5

8.5

1.8 Chemical Composition

KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

BeAl ₂ O ₄

Carletonite and Alexandrite Chemical Formula

While comparing Carletonite and Alexandrite 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 Carletonite and Alexandrite chemical formula.

Chemical formula of Carletonite- KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Carletonite and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Carletonite and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Carletonite and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Carletonite is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.