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Smoky Quartz
Smoky Quartz

Star Sapphire
Star Sapphire



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Smoky Quartz
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Star Sapphire

Smoky Quartz and Star Sapphire Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.653.90-4.05
Amber
1 7.18
1.5 Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Not Available
1.6 Cleavage
{0110} Indistinct
Not Available
1.7 Mohs Hardness
7Not Available
Amber
2 10
1.8 Chemical Composition
SiO2
Al 2O 3Ulrich Henn and Claudio C.

Smoky Quartz and Star Sapphire Chemical Formula

While comparing Smoky Quartz 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 Smoky Quartz and Star Sapphire chemical formula.

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

Smoky Quartz and Star Sapphire Specific Gravity

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