ussingite
ussingite cabochon from Russia
Detailed sheet
ussingite
Discovered in 1914, its name honors the Danish mineralogist Niels Viggo Ussing (1864-1911)
CHEMICAL CHARACTERISTICS
Na2Al [Si3O8](OH)
sodium alumino-silicate
PHYSICAL CHARACTERISTICS
Main color
purple
Other colors
white, pink, red
Color of streak
white
Luster
vitreous
Hardness
6.0 to 7.0
Density
2.46 to 2.50
Cleavage
good
Fracture
uneven
OPTICAL PROPERTIES
Transparency
translucent
Refractive index
1.510 - 1.550
Double refraction
0.040
definite, biaxial positive
visible double refraction
Yes
Pleochroism
absent
Number of colors
1
Fluorescence
strong
colors vary, but often green or orange
CRYSTALS PROPERTIES
very rare and small
crystals system
triclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Russia in the Kola peninsula, in Greenland, Canada at Mont St-Hilaire.
use in jewelry
it is cut either in cabochons or faceted, it is of a beautiful pink with a beautiful fluorescence.
Historical
healing properties
It suits the higher chakras and promote creativity, intuition, inspiration.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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