Andalusite and Gahnospinel Physical Properties

Andalusite

Gahnospinel

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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

3.05-3.213.65-4.55

1 7.18

1.5 Fracture

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

ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Good on {110}, poor on {100}

None, but may exhibit slight parting

1.7 Mohs Hardness

7.57.5-8

2 10

1.8 Chemical Composition

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

(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

Andalusite and Gahnospinel Chemical Formula

While comparing Andalusite and Gahnospinel 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 Andalusite and Gahnospinel chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

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Andalusite and Gahnospinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Gahnospinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Gahnospinel Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.65-4.55 whereas that of Gahnospinel is 3.65-4.55.