CHEMICAL CHARACTERISTICS
(Ca,Na)[(Si,Al)4O8]
sodium and calcium alumino-silicate
PHYSICAL CHARACTERISTICS
Main color
green
Other colors
white, grey, colourless, yellow
Color of streak
white
Luster
vitreous
Hardness
6.0 to 6.5
Density
2.70 to 0.00
Cleavage
perfect
Fracture
uneven
very small plane parts are observed on the fracture
OPTICAL PROPERTIES
Transparency
transparent
Refractive index
1.560 - 1.580
Double refraction
0.010
weak biaxial (-)
visible double refraction
No
Dispersion
0,012
Pleochroism
absent
Number of colors
1
Fluorescence
none
CRYSTALS PROPERTIES
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Madagascar, Mexico, El Salvador, South Korea, USA and Australia.
use in jewelry
faceted for collection
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.
