Oligoclase and Afghanite Physical Properties

Oligoclase

Afghanite

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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

2.62-2.67

2.55-2.65

1.5 Fracture

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

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle

1.6 Cleavage

From the Greek, oligos and kasein, little cleavage.

Perfect {10 1 0}

1.7 Mohs Hardness

6-6.5

5.5-6

1.8 Chemical Composition

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

(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

Oligoclase and Afghanite Chemical Formula

While comparing Oligoclase and Afghanite 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 Afghanite 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 Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

Compare Colorless Gems

Oligoclase Vs Pezzottaite

Oligoclase Vs Phosphophyllite

Oligoclase Vs Phenakite

Oligoclase and Afghanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Oligoclase and Afghanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Oligoclase and Afghanite Optical Properties during the identification of gemstone. Specific gravity of Oligoclase is 2.55-2.65 whereas that of Afghanite is 2.55-2.65.