Dumortierite and Star Sapphire Physical Properties

Dumortierite

Star Sapphire

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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

3.26-3.413.90-4.05

1 7.18

1.5 Fracture

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

Not Available

1.6 Cleavage

Distinct on {100}, poor on {110}; parting on {001}

Not Available

1.7 Mohs Hardness

7-8.5Not Available

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

Al 2O 3Ulrich Henn and Claudio C.

Dumortierite and Star Sapphire Chemical Formula

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

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

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Dumortierite and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dumortierite and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.