Spodumene and Alexandrite Physical Properties

Spodumene

Alexandrite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.15-3.213.69-3.81

1 7.18

1.5 Fracture

Uneven, Subconchoidal, Gemstones (2009)

Not Available

1.6 Cleavage

Perfect prismatic, two directions {110} ∧ {1 1 0} at 87°

1,1 ; 3,2.

1.7 Mohs Hardness

6-78.5

2 10

1.8 Chemical Composition

LiAlSi₂O₆

BeAl ₂ O ₄

Spodumene and Alexandrite Chemical Formula

While comparing Spodumene and Alexandrite 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 Spodumene and Alexandrite chemical formula.

Chemical formula of Spodumene- LiAlSi₂O₆
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Spodumene and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spodumene and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spodumene and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Spodumene is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.