Charlesite and Alexandrite Physical Properties

Charlesite

Alexandrite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.79

3.69-3.81

1.5 Fracture

Irregular/uneven, Brittle, Metallic

Not Available

1.6 Cleavage

Perfect on {10bar10}

1,1 ; 3,2.

1.7 Mohs Hardness

2.5

8.5

1.8 Chemical Composition

Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)

BeAl ₂ O ₄

Charlesite and Alexandrite Chemical Formula

While comparing Charlesite 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 Charlesite and Alexandrite chemical formula.

Chemical formula of Charlesite- Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Charlesite and Alexandrite Specific Gravity

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