Agate Opal and Andalusite Physical Properties

Agate Opal

Andalusite

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1 Physical Properties

1.2 Tenacity

Not Available

1.4 Solubility

Not Available

1.6 Durability

Not Available

1.8 Specific Gravity

1.98-2.503.05-3.21

1 7.18

1.11 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001)

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

1.13 Cleavage

Not Available

Good on {110}, poor on {100}

1.14 Mohs Hardness

5.5-6.57.5

2 10

1.16 Chemical Composition

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

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

Agate Opal and Andalusite Chemical Formula

While comparing Agate Opal 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 Agate Opal and Andalusite chemical formula.

Chemical formula of Agate Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Agate Opal Vs Hydrophane

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Agate Opal Vs Cristinite

Agate Opal and Andalusite Specific Gravity

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