Londonite and Alexandrite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.34
3.69-3.81
Fracture
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Not Available
Mohs Hardness
Not Available
8.5
Chemical Composition
(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
BeAl 2 O 4
Londonite and Alexandrite Chemical Formula
While comparing Londonite and Alexandrite 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 Londonite and Alexandrite chemical formula.
- Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Alexandrite- BeAl 2 O 4
Londonite and Alexandrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Londonite and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Londonite and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Londonite is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.