Andalusite and Apophyllite KF Physical Properties

Andalusite

Apophyllite KF

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.05-3.212.33-2.37

1 7.18

1.5 Fracture

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

Uneven, Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

Good on {110}, poor on {100}

Perfect on {001}, imperfect on {110}

1.7 Mohs Hardness

7.54.5-5

2 10

1.8 Chemical Composition

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

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

Andalusite and Apophyllite KF Chemical Formula

While comparing Andalusite and Apophyllite KF 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 Apophyllite KF chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)

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Andalusite and Apophyllite KF Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Apophyllite KF Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Apophyllite KF Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 2.33-2.37 whereas that of Apophyllite KF is 2.33-2.37.