Sard and Andalusite Physical Properties

Sard

Andalusite

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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

2.58-2.63

3.05-3.21

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

Not Available

Good on {110}, poor on {100}

1.7 Mohs Hardness

6.5-7

7.5

1.8 Chemical Composition

SiO 2Ulrich Henn and Claudio C.

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

Sard and Andalusite Chemical Formula

While comparing Sard 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 Sard and Andalusite chemical formula.

Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Compare Blue Gemstones

Sard Vs Spinel

Sard Vs Sillimanite

Sard Vs Sodalite

Sard and Andalusite Specific Gravity

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