sodalite
pink hackmanite from Burma
sodalite from Chile
hackmanite crystal from Afghanistan
pink fluorescence of an hackmanite crystal
light blue hackmanite from Afghanistan
sodalite cabochon
hackmanite crystal on winchite from Afghanistan
solid like inclusions
solid like inclusions in an hackmanite variety
Detailed sheet
sodalite
This is a feldspathoid, his name refers to its high sodium content. Its purplish-blue color is often streaked with white feldspar veinlets.
The Hackmanite is a pink-purple variety discovered in Quebec, Canada. In its formula sulfur has been replaced by chlorine, and has an amazing feature: without light it loses its color, and after returning to a sunlight exposure, it returns, it’s a phenomenon known as tenebrescence.
CHEMICAL CHARACTERISTICS
Na8Al6[Si6O24]Cl2
chloro-alumino sodium silicate
PHYSICAL CHARACTERISTICS
Main color
blue
Other colors
white, grey, pink, purple
Color of streak
white
Luster
vitreous
Hardness
5.5 to 6.0
Density
2.15 to 2.30
Cleavage
indistinct
Fracture
uneven
fracture in grades
OPTICAL PROPERTIES
Transparency
opaque, translucent, transparent
Refractive index
1.480 - 1.490
Double refraction
0.000
none, isotropic
visible double refraction
No
Dispersion
0.018(0.009)
Pleochroism
absent
Number of colors
1
blue sodalite spectrum system
Fluorescence
strong
orange , mainly for those coming from Greenland
CRYSTALS PROPERTIES
in rhombododecahedral shape
crystals system
cubic
OTHER INFORMATIONS
Astrological sign
Gemini, Pisces, Sagittarius, Scorpio
APPROACHING GEMS
Exploited
sites
It is found in syenites, trachytes, pegmatites : Brazil (Bahia), United States (Montana), Canada (Ontario), Greenland, India, Namibia (Fine transparent crystals), Norway, Russia (Urals, in Afghanistan, in Tajikistan.
use in jewelry
Less expensive than lapis lazuli, it is only employed in jewelry in its blue variety, as an ornamental stone or for making cabochons, balls for necklaces and various other objects (ashtrays, cigarette cases, boxes …) the Chinese being specialist on the matter (statuettes). The pink variety is called Hackmanite, its color fades to light.
Recently a gem variety of a deep blue color or lighter was discovered.
Daily care
and precautions
sensitive to schocks
imitations and
treatments
We know how to synthesize commercial sodalite since 1975. It can be confused with dyed jasper.
Historical
healing properties
It would represent a certain mental strenght, the cerebral side, having dense vibrations liaising between mind and matter. She would allow to realize our ideas, clarify them.
It would have a beneficial activity on the nervous system if installed on the Frontal Chakra.
Other
Gems
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notre site web
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