Star Sapphire and Dumortierite Physical Properties

Star Sapphire

Dumortierite

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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

3.90-4.053.26-3.41

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

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

1.7 Mohs Hardness

Not Available7-8.5

2 10

1.8 Chemical Composition

Al 2O 3Ulrich Henn and Claudio C.

AlAl₆O₃BSi₃O₁₈

Star Sapphire and Dumortierite Chemical Formula

While comparing Star Sapphire and Dumortierite 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 Dumortierite chemical formula.

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

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Star Sapphire and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Sapphire and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.