Pumpellyite and Alexandrite Physical Properties

Pumpellyite

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

3.20-3.30

3.69-3.81

1.5 Fracture

Not Available

1.6 Cleavage

Not Available

1,1 ; 3,2.

1.7 Mohs Hardness

5-6

8.5

1.8 Chemical Composition

Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.

BeAl ₂ O ₄

Pumpellyite and Alexandrite Chemical Formula

While comparing Pumpellyite 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 Pumpellyite and Alexandrite chemical formula.

Chemical formula of Pumpellyite- Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.
Chemical formula of Alexandrite- BeAl ₂ O ₄

Compare Green Gemstones

Pumpellyite Vs Sapphire

Pumpellyite Vs Rubellite

Pumpellyite Vs Rutilated Quartz

Pumpellyite and Alexandrite Specific Gravity

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