Verdite and Andalusite Physical Properties

Verdite

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

2.80-3.03.05-3.21

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

{110} Good

Good on {110}, poor on {100}

1.7 Mohs Hardness

37.5

2 10

1.8 Chemical Composition

NaFeS2•2(H2O)

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

Verdite and Andalusite Chemical Formula

While comparing Verdite 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 Verdite and Andalusite chemical formula.

Chemical formula of Verdite- NaFeS2•2(H2O)
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Compare Blue Gemstones

Verdite Vs Yttrium Aluminium Garnet

Verdite Vs Zircon

Verdite Vs White Opal

Verdite and Andalusite Specific Gravity

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