Halite and Andalusite Physical Properties

Halite

Andalusite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Water-soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.17

3.05-3.21

1.5 Fracture

Conchoidal, Brittle, Metallic

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

1.6 Cleavage

Perfect {001}, three directions cubic

Good on {110}, poor on {100}

1.7 Mohs Hardness

2.0-2.5

7.5

1.8 Chemical Composition

NaCl

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

Halite and Andalusite Chemical Formula

While comparing Halite 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 Halite and Andalusite chemical formula.

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

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Halite Vs Iddingsite

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Halite Vs Heliotrope

Halite and Andalusite Specific Gravity

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