Astrophyllite and Epidote Physical Properties

Astrophyllite

Epidote

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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

3.2-3.43.25-3.50

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Fibrous

1.6 Cleavage

Perfect on [001] imperfect on [100]

{001} perfect and {100} imperfect

1.7 Mohs Hardness

36-7

2 10

1.8 Chemical Composition

(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

CaAl 2(Fe3+ ,Al)Si 3O 12(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Astrophyllite and Epidote Chemical Formula

While comparing Astrophyllite and Epidote 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 Epidote chemical formula.

Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Epidote- CaAl 2(Fe3+ ,Al)Si 3O 12(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Astrophyllite and Epidote Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Epidote Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Epidote Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.25-3.50 whereas that of Epidote is 3.25-3.50.