Carnelian and Spinel Physical Properties

Carnelian

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

2.58-2.64

3.64-3.66

1.5 Fracture

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

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Absent

None, but may exhibit slight parting

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

SiO₂

MgAl₂O₄

Carnelian and Spinel Chemical Formula

While comparing Carnelian and Spinel 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 Spinel chemical formula.

Chemical formula of Carnelian- SiO₂
Chemical formula of Spinel- MgAl₂O₄

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Carnelian and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Carnelian and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Carnelian and Spinel Optical Properties during the identification of gemstone. Specific gravity of Carnelian is 3.64-3.66 whereas that of Spinel is 3.64-3.66.