vanadinite
group of vanadinite crystals from Morocco
Detailed sheet
vanadinite
Discovered in 1838 in Mexico, its name comes from its composition, rich in vanadium.
CHEMICAL CHARACTERISTICS
Pb5[VO4]3Cl
lead vanadate
PHYSICAL CHARACTERISTICS
Main color
red
Other colors
brown, colourless, yellow, orange
Color of streak
yellow
Luster
adamantine, resinous
Hardness
2.5 to 3.0
Density
6.50 to 7.10
Cleavage
none
Fracture
conchoidal, uneven
OPTICAL PROPERTIES
Transparency
opaque, translucent
Refractive index
2.350 - 2.460
Double refraction
0.065
strong uniaxial negative
visible double refraction
No
Dispersion
0,200
Pleochroism
very weak
Number of colors
2
colorless, colored on almost transparent samples
vanadinite spectrum system
Fluorescence
none
CRYSTALS PROPERTIES
massive, flattened dipyramids
crystals system
hexagonal
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Morocco (Mibladen), United States (Arizona, Old Yuma Mine), Namibia, Zambia, Congo.
use in jewelry
it is cabochon cut only for collection, very fragile and sensitive to daylight.
Historical
healing properties
It is linked to the center of sacred energy and bring sexual vigor.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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