CHEMICAL CHARACTERISTICS
(Ca,Fe)[Si2O6]
iron and calcium inosilicate
PHYSICAL CHARACTERISTICS
Main color
green
Other colors
blue, black
Color of streak
grey, green
Luster
vitreous
Hardness
5.5 to 6.5
Density
3.50 to 3.56
Cleavage
good
Fracture
conchoidal
easy pearly cleavage along a single axis
OPTICAL PROPERTIES
Transparency
opaque, translucent
Refractive index
1.716 - 1.751
Double refraction
0.025
definite, biaxial positive
visible double refraction
No
Dispersion
++
Pleochroism
very weak
Number of colors
2
green, shade of green whether blue or yellow
Fluorescence
variable
can be green
CRYSTALS PROPERTIES
short prismatic or columnar or acicular
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Sweden, Scotland, in the Yukon in Canada, Greenland, Brazil, Madagascar.
use in jewelry
it is cabochon cut, it is a collection stone
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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