Creedite and Tanzanite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Hard
  
Specific Gravity
2.70
  
3.35
  
Fracture
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
  
Cleavage
Perfect on {100}
  
Perfect {010}, imperfect {100}
  
Mohs Hardness
4.5
  
6.5-7
  
Chemical Composition
Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.
  
Ca2Al3(SiO4)3(OH)
  
Creedite and Tanzanite Chemical Formula
While comparing Creedite and Tanzanite 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 Creedite and Tanzanite chemical formula.
- Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.
- Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)
Creedite and Tanzanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Creedite and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Creedite and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Creedite is 3.35 whereas that of Tanzanite is 3.35.