richterite
richterite crystal
solid like inclusions
Detailed sheet
richterite
Discovered in 1865, its name honors the German mineralogist Theodor Richter (1824-1898).
CHEMICAL CHARACTERISTICS
Na2CaMg3Fe2[Si8O22](OH)2
iron - magnesium inosilicate
PHYSICAL CHARACTERISTICS
Main color
blue
Other colors
purple
mixture of purple and violet
Color of streak
white
Luster
greasy, vitreous
Hardness
5.0 to 6.0
Density
2.94 to 3.45
Cleavage
perfect
Fracture
uneven
OPTICAL PROPERTIES
Transparency
opaque
Refractive index
1.605 - 1.665
Double refraction
0.016
definite, biaxial (-)
visible double refraction
No
Dispersion
+
Pleochroism
absent
Number of colors
1
blue richterite spectrum system
Fluorescence
none
CRYSTALS PROPERTIES
prismatic, tabular
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Brazil, South Africa, Namibia, Brazil, Australia, United States (Hawaii, California, Texas, Montana), Greenland, Russia (Kola Peninsula), Japan.
use in jewelry
made into cabochons, platelets.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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