Tanzanite and Londonite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Hard
Not Available
Specific Gravity
3.35
3.34
Fracture
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
Perfect {010}, imperfect {100}
None
Mohs Hardness
6.5-7
Not Available
Chemical Composition
Ca2Al3(SiO4)3(OH)
(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Tanzanite and Londonite Chemical Formula
While comparing Tanzanite and Londonite 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 Londonite chemical formula.
- Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)
- Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Tanzanite and Londonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Tanzanite and Londonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Londonite Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 3.34 whereas that of Londonite is 3.34.