boleite
Detailed sheet
boleite
It is named after its place of discovery: Boleo, Baja California, Mexico.
It was identified by Mallard and Cumenge in 1897.
CHEMICAL CHARACTERISTICS
KPb26Ag9Cu24(OH)48Cl62
complex halide mineral
PHYSICAL CHARACTERISTICS
Main color
blue
light blue to indigo
Color of streak
blue
Luster
pearly, vitreous
Hardness
3.0 to 3.5
Density
4.80 to 5.20
Cleavage
perfect
Fracture
uneven
easy cleavage only in one direction, fracture with very small flat surfaces
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.970 - 2.050
Double refraction
0.000
zero birefringence, isotropic
visible double refraction
No
Dispersion
très faible(-)
Pleochroism
absent
Number of colors
1
Fluorescence
none
CRYSTALS PROPERTIES
well shaped cubic crystals with or without truncation
crystals system
cubic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in England (Cornwall), Germany (Saxony), United States (Arizona) at Boleo in Mexico where she was discovered and France (Cap Garonne Mine, Var).
use in jewelry
rare collection stone, faceted
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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