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Phlogopite
Phlogopite

Andalusite
Andalusite



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Phlogopite
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Andalusite

Phlogopite and Andalusite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Tough
-
-
2.78-2.85
Uneven
Perfect basal (001)
2-2.5
KMg3(Si3Al)O10(F,OH)2
 
-
-
-
3.05-3.21
Uneven, Subconchoidal, Splintery
Good on {110}, poor on {100}
7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Phlogopite and Andalusite Chemical Formula

While comparing Phlogopite 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 Phlogopite and Andalusite chemical formula.

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Phlogopite and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phlogopite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phlogopite Vs Andalusite during the identification of gemstone. Specific gravity of Phlogopite is whereas that of Andalusite is .