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Sapphire
Sapphire

Rock Crystal
Rock Crystal



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Sapphire
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Rock Crystal

Sapphire and Rock Crystal Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
insoluble
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.95-4.032.65
Amber
1 7.18
1.5 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
1.6 Cleavage
None, but may exhibit parting
Not Available
1.7 Mohs Hardness
97
Amber
2 10
1.8 Chemical Composition
Al 2 O 3
SiO 2Walter Schumann , Gemstones of the world (2001)

Sapphire and Rock Crystal Chemical Formula

While comparing Sapphire and Rock Crystal 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 Sapphire and Rock Crystal chemical formula.

  • Chemical formula of Sapphire- Al 2 O 3
  • Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)

Sapphire and Rock Crystal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sapphire and Rock Crystal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Rock Crystal Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.65 whereas that of Rock Crystal is 2.65.