Shigaite and Andalusite Physical Properties

Shigaite

Andalusite

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1 Physical Properties

1.1 Tenacity

Moderately ﬂexible

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.32

3.05-3.21

1.5 Fracture

Flexible Flexible fragments.

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

1.6 Cleavage

Perfect on {0001}

Good on {110}, poor on {100}

1.7 Mohs Hardness

7.5

1.8 Chemical Composition

Not Available

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

Shigaite and Andalusite Chemical Formula

While comparing Shigaite 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 Shigaite and Andalusite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Shigaite and Andalusite Specific Gravity

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