Andalusite and Ludlamite Physical Properties

Andalusite

Ludlamite

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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

3.05-3.21

3.1-3.2

1.5 Fracture

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

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Good on {110}, poor on {100}

Vitreous, pearly on cleavage

1.7 Mohs Hardness

7.5

3-4

1.8 Chemical Composition

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

(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Andalusite and Ludlamite Chemical Formula

While comparing Andalusite and Ludlamite 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 Ludlamite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Andalusite and Ludlamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Ludlamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Ludlamite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.1-3.2 whereas that of Ludlamite is 3.1-3.2.