Carnelian and Almandine Physical Properties

Carnelian

Almandine

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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

2.58-2.64

3.95-4.30

1.5 Fracture

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

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

Absent

none

1.7 Mohs Hardness

6.5-7

7-7.5

1.8 Chemical Composition

SiO₂

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Carnelian and Almandine Chemical Formula

While comparing Carnelian and Almandine 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 Almandine chemical formula.

Chemical formula of Carnelian- SiO₂
Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Carnelian and Almandine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Carnelian and Almandine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Carnelian and Almandine Optical Properties during the identification of gemstone. Specific gravity of Carnelian is 3.95-4.30 whereas that of Almandine is 3.95-4.30.