Binghamite and Alexandrite Physical Properties

Binghamite

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

2.55-2.703.69-3.81

1 7.18

1.5 Fracture

Not Available

1.6 Cleavage

Not Available

1,1 ; 3,2.

1.7 Mohs Hardness

6.5-78.5

2 10

1.8 Chemical Composition

SiO 2Arthur Thomas , Gemstones (2009)

BeAl ₂ O ₄

Binghamite and Alexandrite Chemical Formula

While comparing Binghamite 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 Binghamite and Alexandrite chemical formula.

Chemical formula of Binghamite- SiO 2Arthur Thomas , Gemstones (2009)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Binghamite and Alexandrite Specific Gravity

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