Carnelian and Alexandrite Physical Properties

Carnelian

Alexandrite

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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

2.58-2.643.69-3.81

1 7.18

1.5 Fracture

Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

Not Available

1.6 Cleavage

Absent

1,1 ; 3,2.

1.7 Mohs Hardness

6.5-78.5

2 10

1.8 Chemical Composition

SiO₂

BeAl ₂ O ₄

Carnelian and Alexandrite Chemical Formula

While comparing Carnelian 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 Carnelian and Alexandrite chemical formula.

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

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Carnelian Vs Quartz

Carnelian Vs Prasiolite

Carnelian Vs Kunzite

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Carnelian and Alexandrite Specific Gravity

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