Thomsonite and Alexandrite Physical Properties

Thomsonite

Alexandrite

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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

2.25-2.403.69-3.81

1 7.18

1.5 Fracture

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)

Not Available

1.6 Cleavage

perfect on {010}; good on {100}

1,1 ; 3,2.

1.7 Mohs Hardness

5-5.58.5

2 10

1.8 Chemical Composition

NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

BeAl ₂ O ₄

Thomsonite and Alexandrite Chemical Formula

While comparing Thomsonite 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 Thomsonite and Alexandrite chemical formula.

Chemical formula of Thomsonite- NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Thomsonite and Alexandrite Specific Gravity

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