Oligoclase and Astrophyllite Physical Properties

Oligoclase

Astrophyllite

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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

2.62-2.673.2-3.4

1 7.18

1.5 Fracture

Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven

Uneven, Brittle, Metallic

1.6 Cleavage

From the Greek, oligos and kasein, little cleavage.

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

6-6.53

2 10

1.8 Chemical Composition

Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Oligoclase and Astrophyllite Chemical Formula

While comparing Oligoclase and Astrophyllite 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 Oligoclase and Astrophyllite chemical formula.

Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Compare Colorless Gems

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Oligoclase Vs Pezzottaite

Oligoclase Vs Phosphophyllite

Oligoclase and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Oligoclase and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Oligoclase and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Oligoclase is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.