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Andalusite
Andalusite

Demantoid
Demantoid



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Andalusite
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Demantoid

Andalusite and Demantoid Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
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
 
-
-
-
3.77-3.95
-
Imperfect
6.5
Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.

Andalusite and Demantoid Chemical Formula

While comparing Andalusite and Demantoid 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 Demantoid chemical formula.

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Andalusite and Demantoid Specific Gravity

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