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Tanzanite
Tanzanite

Petalite
Petalite



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Tanzanite and Petalite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
insoluble
1.3 Durability
Hard
Not Available
1.4 Specific Gravity
3.35
2.40
1.5 Fracture
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
1.6 Cleavage
Perfect {010}, imperfect {100}
Perfect on {001}, poor on {201} with 38.5° angle between the two
1.7 Mohs Hardness
6.5-7
6-6.5
1.8 Chemical Composition
Ca2Al3(SiO4)3(OH)
LiAlSi 4O 10Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Tanzanite and Petalite Chemical Formula

While comparing Tanzanite and Petalite 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 Tanzanite and Petalite chemical formula.

  • Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)
  • Chemical formula of Petalite- LiAlSi 4O 10Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Tanzanite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 2.40 whereas that of Petalite is 2.40.