carrollite
carrollite crystal from Zaire
Detailed sheet
carrollite
Its name comes from the locality where it was identified by Faber in 1852: the Patapsco mine in Carroll County, Maryland in the United States.
It is part of the linnaeïtes, it forms a series with the violarite, the polydymite, the siegenite according to the proportions of copper, cobalt, nickel and iron.
CHEMICAL CHARACTERISTICS
Cu(Co,Ni)2S4
copper, cobalt, nickel sulfide with iron traces
PHYSICAL CHARACTERISTICS
Main color
grey
Other colors
red, purple
metallic silver with red and purple shades
Color of streak
grey
Luster
metallic
Hardness
4.5 to 5.5
Density
4.50 to 4.80
Cleavage
none
Fracture
uneven
fragile but with no visible cleavage
OPTICAL PROPERTIES
Transparency
opaque
Refractive index
0.000 - 0.000
Double refraction
0.000
refractive index and birefringence illegibles
visible double refraction
No
Pleochroism
absent
Number of colors
1
Fluorescence
none
CRYSTALS PROPERTIES
octahedral and cubic crystals
crystals system
cubic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
In France it is found in Saint Veran in the High Alps and in Corsica at the Finosa Mine near Corte.
The main samples come from Katanga in Congo (Mine near Kamoya Musonoï). It is also found in Australia, Zambia, Namibia Tsumeb, Morocco Bou Azzer, in the Palatinate in Germany, Bulgaria, Alaska, Canada (Thierry Mine in Ontario and British Colmobie) and of course in Maryland in the United States as in Colorado, Wisconsin …
use in jewelry
it’s uniquely a collection stone
Daily care
and precautions
fragile, very sensitive to shocks
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo consectetur adipiscing elit. Ut elit tellus, luctus nec.
