Fuchsite and Alexandrite Physical Properties

Fuchsite

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

2.77-2.88

3.69-3.81

1.5 Fracture

Uneven

Not Available

1.6 Cleavage

Perfect basal

1,1 ; 3,2.

1.7 Mohs Hardness

2.5

8.5

1.8 Chemical Composition

K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)

BeAl ₂ O ₄

Fuchsite and Alexandrite Chemical Formula

While comparing Fuchsite 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 Fuchsite and Alexandrite chemical formula.

Chemical formula of Fuchsite- K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Fuchsite and Alexandrite Specific Gravity

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