Achroite and Tanzanite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Hard
Specific Gravity
2.90-3.40
3.35
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
Cleavage
Not Available
Perfect {010}, imperfect {100}
Mohs Hardness
7-7.5
6.5-7
Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Ca2Al3(SiO4)3(OH)
Achroite and Tanzanite Chemical Formula
While comparing Achroite 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 Achroite and Tanzanite chemical formula.
- Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
- Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)
Achroite and Tanzanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 3.35 whereas that of Tanzanite is 3.35.