greenockite
greenockite from Bishoptown in scotland
Detailed sheet
greenockite
Its name honors Lord Greenock, from Greenock in Scotland where it was discovered in 1840.
CHEMICAL CHARACTERISTICS
CdS
cadmium sulfure
PHYSICAL CHARACTERISTICS
Main color
orange
Other colors
brown, yellow
Color of streak
orange
Luster
adamantine, resinous
Hardness
2.0 to 3.5
Density
4.00 to 5.00
Cleavage
perfect
Fracture
uneven
perfect cleavage only in one dimension. uneven fracture with small flat parts
OPTICAL PROPERTIES
Transparency
opaque, translucent, transparent
Refractive index
2.505 - 2.530
Double refraction
0.022
definite, uniaxial (+/-)
visible double refraction
Yes
Dispersion
-
Pleochroism
weak
Number of colors
2
yellow, red
Fluorescence
variable
yellow - orange
CRYSTALS PROPERTIES
radial crystallization or indistinct masses
crystals system
hexagonal
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in many deposits but rarely in its orange and transparent color. Mainly in Peru, Bolivia, Mexico, the United States, Canada, China, Vietnam.
use in jewelry
faceted it’s a collection stone
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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