Alexandrite ( (BeAl2O4:Cr3+) is first-class precious stone, one of the hardest and long living jewels (only diamond, sapphire and ruby stay before).
The most marvelous property of this gem is its ability to change color in accordance with source of lightening. Alexandrite becomes green like emerald in daylight, artificial lightening makes this magic stone purple-red. We possess the perfectly developed technology of Alexandrite obtaining.
Created Alexandrite is the complete analog of naturally occurring one. Many years we have been delivering high quality Alexandrite crystals to USA, South-Eastern Asia and other international markets.
Matrix properties
Molecular weight
126.97
Mean dislocation density, cm2
103
Syngony
Rhombic
Spatial group
Pnma
Unit sell parameters, Å
a = 5.47
b = 9.39
c = 4.42
Refraction indexes
Ng = 1.753
Nm = 1.747
Np = 1.744
Density, g/cm3
3.79
Moh’s hardness
8.5
Axial characteristics
Biaxial
Melting point,oC
1870
Thermal conductivity, W/cmo
K
0.23
Color
Green (for daylight),
Red (for artificial lightening)
