Actinolite and Alexandrite Physical Properties

Actinolite

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

3.003.69-3.81

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009), Splintery

Not Available

1.6 Cleavage

perfect along {110}.

1,1 ; 3,2.

1.7 Mohs Hardness

5-68.5

2 10

1.8 Chemical Composition

Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.

BeAl ₂ O ₄

Actinolite and Alexandrite Chemical Formula

While comparing Actinolite 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 Actinolite and Alexandrite chemical formula.

Chemical formula of Actinolite- Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Actinolite and Alexandrite Specific Gravity

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