Charlesite and Andalusite Physical Properties

Charlesite

Andalusite

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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

3.05-3.21

1.5 Fracture

Irregular/uneven, Brittle, Metallic

Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect on {10bar10}

Good on {110}, poor on {100}

1.7 Mohs Hardness

2.5

7.5

1.8 Chemical Composition

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

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Charlesite and Andalusite Chemical Formula

While comparing Charlesite and Andalusite 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 Andalusite chemical formula.

Chemical formula of Charlesite- Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Charlesite and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Charlesite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Charlesite and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Charlesite is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.