mellite
mellite crystal from Hungary
mellite fancy cut
Detailed sheet
mellite
Discovered in 1789, is a compound of organic origin. Its name comes from the Greek “melis” which means honey, referring to its color.
CHEMICAL CHARACTERISTICS
Al2C12H12 - 18(H2O)
organic mineral
PHYSICAL CHARACTERISTICS
Main color
yellow
Other colors
white, brown, orange
Color of streak
white
Luster
greasy, resinous
Hardness
2.0 to 2.5
Density
1.60 to 0.00
Cleavage
indistinct
Fracture
conchoidal
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.509 - 1.541
Double refraction
0.060
strong uniaxial negative
visible double refraction
Yes
Pleochroism
definite
Number of colors
2
brown, yellow
Fluorescence
strong
blue, sometimes also from yellow to green
CRYSTALS PROPERTIES
in massive agregates
crystals system
tetragonal
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Russia in the region of Bogorodetsk, Hungary, Saxony and Thuringia in Germany, Czech Republic (Bohemia and Moravia), in Austria.
use in jewelry
is is cut for its beautiful amber color
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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