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Astrophyllite
Astrophyllite

Fayalite
Fayalite



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Astrophyllite
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Fayalite

Astrophyllite and Fayalite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.2-3.4
Uneven
Perfect on [001] imperfect on [100]
3
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
 
-
-
-
4.392
Conchoidal
{010} moderate, {100} imperfect
6.5-7
Fe 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Astrophyllite and Fayalite Chemical Formula

While comparing Astrophyllite and Fayalite 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 Astrophyllite and Fayalite chemical formula.

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Astrophyllite and Fayalite Specific Gravity

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