Star Sapphire and Carnelian Physical Properties

Star Sapphire

Carnelian

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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

3.90-4.052.58-2.64

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

Absent

1.7 Mohs Hardness

Not Available6.5-7

2 10

1.8 Chemical Composition

Al 2O 3Ulrich Henn and Claudio C.

SiO₂

Star Sapphire and Carnelian Chemical Formula

While comparing Star Sapphire and Carnelian 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 Star Sapphire and Carnelian chemical formula.

Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
Chemical formula of Carnelian- SiO₂

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Star Sapphire and Carnelian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Sapphire and Carnelian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Carnelian Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 2.58-2.64 whereas that of Carnelian is 2.58-2.64.