Brazilianite and Andalusite Physical Properties

Brazilianite

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

2.98-2.993.05-3.21

1 7.18

1.5 Fracture

Conchoidal, Gems

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

1.6 Cleavage

(010) Distinct to good

Good on {110}, poor on {100}

1.7 Mohs Hardness

5.57.5

2 10

1.8 Chemical Composition

NaAl 3(PO 4) 2(OH) 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Brazilianite and Andalusite Chemical Formula

While comparing Brazilianite 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 Brazilianite and Andalusite chemical formula.

Chemical formula of Brazilianite- NaAl 3(PO 4) 2(OH) 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Brazilianite and Andalusite Specific Gravity

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