ceruleite
blend of ceruleite and kaolin from San Domingo in Chile
CHEMICAL CHARACTERISTICS
Cu2Al7[AsO4]4(OH)13 - 12 (H2O)
copper aluminium arsenate mineral
PHYSICAL CHARACTERISTICS
Main color
blue
lighter or darker blue turquoise
Color of streak
blue
Luster
greasy
Hardness
5.0 to 6.0
Density
2.70 to 2.80
Cleavage
indistinct
Fracture
uneven
OPTICAL PROPERTIES
Transparency
opaque
Refractive index
1.600 - 1.650
Double refraction
0.000
opaque, biaxial
visible double refraction
No
Dispersion
-
Pleochroism
absent
Number of colors
1
Fluorescence
weak
white yellowish
Inclusions
pyrite, quartz, ferruginous elements yellow-brown, and black due to manganese
CRYSTALS PROPERTIES
botryoidal masses, globular cluster of very fine crystals
crystals system
triclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in France in the Cap Garonne mine in the Var, in Cornwall, England, in the Pilbara region in Australia, Chile (Santa Catalina), Portugal and South Africa.
use in jewelry
It is cut into cabochons, made into pendants or rings of a beautiful sky blue.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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