Andalusite and Apatite Physical Properties

Andalusite

Apatite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.05-3.21

3.16-3.23

1.5 Fracture

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

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven

1.6 Cleavage

Good on {110}, poor on {100}

[0001] indistinct, [1010] indistinct

1.7 Mohs Hardness

7.5

1.8 Chemical Composition

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

Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Andalusite and Apatite Chemical Formula

While comparing Andalusite and Apatite 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 Apatite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Compare Brown Gemstones

Andalusite Vs Baryte Barite

Andalusite Vs Baddeleyite

Andalusite Vs Augite

Andalusite and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.