vlasovite
blue vlasovite from Canada
Detailed sheet
vlasovite
Discovered in the Kola peninsula in Russia, it honors the name of the Russian mineralogist Kuzma Alekseevich Vlasov (1905-1964).
CHEMICAL CHARACTERISTICS
Na2Zr[Si4O11]
zirconium and sodium silicate
PHYSICAL CHARACTERISTICS
Main color
yellow
Other colors
brown, colourless
Color of streak
white
Luster
greasy, vitreous
Hardness
6.0 to 0.0
Density
2.90 to 3.00
Cleavage
perfect
Fracture
conchoidal
OPTICAL PROPERTIES
Transparency
transparent
Refractive index
1.605 - 1.628
Double refraction
0.020
definite, biaxial (-)
visible double refraction
Yes
Pleochroism
absent
Number of colors
1
Fluorescence
moderate
orange yellow
CRYSTALS PROPERTIES
prismatic
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is also found in the Temiscamingue lakes region in Quebec, in Labrador in Canada and Russia.
use in jewelry
faceted for collection
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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