Alexandrite and Oligoclase Physical Properties

Alexandrite

Oligoclase

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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

3.69-3.812.62-2.67

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

1,1 ; 3,2.

From the Greek, oligos and kasein, little cleavage.

1.7 Mohs Hardness

8.56-6.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

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

Alexandrite and Oligoclase Chemical Formula

While comparing Alexandrite and Oligoclase 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 Alexandrite and Oligoclase chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems for Scorpio

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Alexandrite Vs Fluorite

Alexandrite Vs Gahnospinel

Alexandrite and Oligoclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.