Tanzanite and Andradite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Hard
Not Available
Specific Gravity
3.35
3.70-4.10
Fracture
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Perfect {010}, imperfect {100}
none
Mohs Hardness
6.5-7
6.5-7
Chemical Composition
Ca2Al3(SiO4)3(OH)
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Tanzanite and Andradite Chemical Formula
While comparing Tanzanite and Andradite 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 Andradite chemical formula.
- Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)
- Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Tanzanite and Andradite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Tanzanite and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Andradite Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 3.70-4.10 whereas that of Andradite is 3.70-4.10.