milarite
Detailed sheet
milarite
Kenngott in 1870 awarded it its name from its first assumed place of discovery: the Val Mila in Switzerland, but this is not certain.
CHEMICAL CHARACTERISTICS
K2Ca4Al2Be4[Si24O60] - (H2O)
hydrated beryllium, aluminum silicate
PHYSICAL CHARACTERISTICS
Main color
yellow
Other colors
brown, colourless
Color of streak
white
Luster
vitreous
Hardness
5.5 to 6.0
Density
2.45 to 2.60
Cleavage
indistinct
Fracture
uneven
OPTICAL PROPERTIES
Transparency
translucent
Refractive index
1.526 - 1.550
Double refraction
0.003
very weak, uniaxial (-)
visible double refraction
No
Pleochroism
absent
Number of colors
1
Fluorescence
none
CRYSTALS PROPERTIES
prismatic
crystals system
hexagonal
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Mexico (Valenciana Mine), Ethiopia (Konso), in the Altai in Mongolia, China, USA, Sweden, Austria (Tyrol), Switzerland (Valais).
use in jewelry
it’s a collection stone
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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