


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
Venez visitez
notre site web
voillot-joaillier.fr
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