senarmontite
senamontite crystal from Constantine in Algeria
Detailed sheet
senarmontite
Discovered in 1851 at Djebel Haminate, in the area of Constantine in Algeria, its name honors the mineralogist Henri Hureau de Senarmont (1808-1862).
CHEMICAL CHARACTERISTICS
Sb2O3
antimony oxide
PHYSICAL CHARACTERISTICS
Main color
colourless
Other colors
white, grey
Color of streak
white
Hardness
2.0 to 2.5
Density
5.20 to 5.50
Cleavage
indistinct
Fracture
uneven
on the fracture, very small planar portions can be seen
OPTICAL PROPERTIES
Transparency
opaque, translucent
not really transparent
Refractive index
2.087 - 0.000
Double refraction
0.000
zero, isotropic but strong polarization anomalies can be detected
visible double refraction
No
Dispersion
-
Pleochroism
absent
Number of colors
1
Fluorescence
none
CRYSTALS PROPERTIES
well shaped octahedral, of a very small size
crystals system
cubic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Hunan in China, Dalnegorsk in eastern Siberia, Russia. Also in Canada, Quebec in the antimony mine in Lake Nicolet, in Europe, on the east coast of the United States.
use in jewelry
cut in facets for collection
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Gems
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