pyrargyrite
pyrargyrite crystals from Jachimov in Bohemia
Detailed sheet
pyrargyrite
Described in 1831 by Glocker, its name comes from the Greek “pyros” meaning fire and “Argyros” for money. It is a silver salt of a fire red color.
CHEMICAL CHARACTERISTICS
Ag3SbS3
silver sulphide and antimony
PHYSICAL CHARACTERISTICS
Main color
red
Other colors
grey
it becomes gray - black after prolonged exposure to light
Color of streak
red
Hardness
2.5 to 3.0
Density
2.88 to 3.08
Cleavage
good
Fracture
conchoidal, uneven
distinct cleavage only in one axe
OPTICAL PROPERTIES
Transparency
opaque, translucent
Refractive index
2.880 - 3.080
Double refraction
0.200
very strong uniaxial ( - )
visible double refraction
No
Dispersion
+
Pleochroism
very weak
Number of colors
2
shades of red
Fluorescence
none
CRYSTALS PROPERTIES
prismatic
crystals system
trigonal
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Bolivia (Potosi Mines), Peru (Huaron), Ecuador, Mexico (La Luz), Indonesia (Java Island), Germany, England (Cornwall) United States (Nevada , Idaho, California).
use in jewelry
Sensitive to light and fragile, it is only a collection stone.
Daily care
and precautions
It must be kept away from sunlight and ultraviolet rays
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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