leucophanite
Yellow crystal of leucophanite with dark meliphanite from Mont Saint-Hilaire in Canada
Detailed sheet
leucophanite
Its name comes from the Greek “Leucos” which means white and “phanen”, “which appears” in connection with its color often white.
It was discovered in 1840 in Norway.
CHEMICAL CHARACTERISTICS
(Na,Ca)Be[Si2O6] F
beryllium fluoro-silicate
PHYSICAL CHARACTERISTICS
Main color
yellow
Other colors
green
Color of streak
white
Hardness
4.0 to 0.0
Density
3.00 to 0.00
Cleavage
perfect
Fracture
conchoidal, uneven
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.550 - 1.600
Double refraction
0.020
definite, biaxial (-)
visible double refraction
Yes
Pleochroism
absent
Number of colors
1
Fluorescence
weak
pink
Inclusions
fine needles of aegirine
CRYSTALS PROPERTIES
tabular
crystals system
triclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found at Mont Saint-Hilaire in Canada, in the Kola Peninsula in Russia, Greenland, England, Norway, Kazakhstan.
use in jewelry
interesting collection stone with its inclusions
Other
Gems
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