shomiokite
shomiokite crystals from the Kola Peninsula in Russia
Detailed sheet
shomiokite
Discovered in the Kola Peninsula, near the river Shomiok that gave it its name.
CHEMICAL CHARACTERISTICS
Na3Y[CO3]3 - 3(H2O)
hydrous sodium carbonate and yttrium
PHYSICAL CHARACTERISTICS
Main color
pink
Other colors
colourless
Color of streak
white
Luster
silky
Hardness
2.0 to 3.0
Density
2.65 to 0.00
Cleavage
perfect
Fracture
uneven
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.530 - 1.540
Double refraction
0.003
very weak, biaxial (+)
visible double refraction
No
Pleochroism
absent
Number of colors
1
Fluorescence
none
CRYSTALS PROPERTIES
acicular sheaf fused or in compact masses
crystals system
orthorhombic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
it is found also at Mont St. – Hilaire in Canada
use in jewelry
collection stone
Other
Gems
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