Quartz and Alexandrite Physical Properties

Quartz

Alexandrite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.653.69-3.81

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Brittle, Gems

Not Available

1.6 Cleavage

{0110} Indistinct

1,1 ; 3,2.

1.7 Mohs Hardness

78.5

2 10

1.8 Chemical Composition

SiO₂

BeAl ₂ O ₄

Quartz and Alexandrite Chemical Formula

While comparing Quartz 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 Quartz and Alexandrite chemical formula.

Chemical formula of Quartz- SiO₂
Chemical formula of Alexandrite- BeAl ₂ O ₄

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Quartz and Alexandrite Specific Gravity

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