Hackmanite -8.76 ct -SOLD

spanish sphalerite

spanish sphalerite

spanish sphalerite




Hackmanite, tenebrescent varity of sodalite - very rare stone!
Large cabochone to observe VERY marked tenebrescence effect
- temporary change of color when exposed to UV light.
Also observed under sunlight, UV portion is enough to change the color of this stone to violet!
Na
 
8
Al
 
6
Si
 
6
O
 
24
(Cl
 
2
,S)

Fantastic sample for rare gems collectors!

Weight:8.76 ct
Size:16.3 x 12.8 x 6.4 mm
Color:colorless in normal condition, violet after some minutes exposition to UV light (not photographed)
Clarity:translucent to opaque
Cut:
oval cabochon
Treatments:not treated
Origin:Afganistan
Price:SOLD


Faceted spanish sphalerite

Click here to see more info on Hackmanite on Mindat website

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