tugtupite
tugtupite from Greenland
solid and color type inclusions
Detailed sheet
tugtupite
Mineral discovered in 1960 simultaneously in the Kola Peninsula (Russia) and south of Greenland, its name comes from an Inuit word meaning ” Reindeer blood ” (“tugtup” means reindeer in Eskimo). Stone of a beautiful color.
Without light it loses its color, and after returning to a sunlight exposure, it returns, it’s a phenomenon known as tenebrescence.
CHEMICAL CHARACTERISTICS
Na4(Be,Al)[Si4O12]Cl
beryllium aluminum silicate
PHYSICAL CHARACTERISTICS
Main color
pink
Other colors
white, red, purple
shades of pink around the base
Color of streak
white
Luster
greasy, waxy
Hardness
4.0 to 6.0
Density
2.35 to 2.55
Cleavage
good
Fracture
uneven
OPTICAL PROPERTIES
Transparency
opaque, translucent
sometimes transparent
Refractive index
1.495 - 1.503
Double refraction
0.006
very weak, uniaxial (-)
visible double refraction
No
Pleochroism
very weak
Number of colors
2
pink, orange - red
Fluorescence
strong
red
CRYSTALS PROPERTIES
in massive agregates, and very small crystals
crystals system
tetragonal
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Greenland, Russia, Norway, Canada and the Himalayas.
use in jewelry
collection stone that is cut cabochon
Other
Gems
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