Tanzanite and Ettringite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Hard
Not Available
Specific Gravity
3.35
1.77
Fracture
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
Not Available
Cleavage
Perfect {010}, imperfect {100}
Perfect on {10 1 0}
Mohs Hardness
6.5-7
2-2.5
Chemical Composition
Ca2Al3(SiO4)3(OH)
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Tanzanite and Ettringite Chemical Formula
While comparing Tanzanite and Ettringite 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 Ettringite chemical formula.
- Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Tanzanite and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Tanzanite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 1.77 whereas that of Ettringite is 1.77.