Carnelian and Augelite Physical Properties

Carnelian

Augelite

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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

2.70-2.75

1.5 Fracture

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

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Absent

From the Greek for luster, for its pearly luster on the cleavage.

1.7 Mohs Hardness

6.5-7

4.5-5

1.8 Chemical Composition

SiO₂

Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

Carnelian and Augelite Chemical Formula

While comparing Carnelian and Augelite 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 Augelite chemical formula.

Chemical formula of Carnelian- SiO₂
Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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Carnelian and Augelite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Carnelian and Augelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Carnelian and Augelite Optical Properties during the identification of gemstone. Specific gravity of Carnelian is 2.70-2.75 whereas that of Augelite is 2.70-2.75.