lazulite
lazulite crystal from Yukon in Canada
liquid like inclusions, healing fissures
Pleochroism : light lazulite
pleochroism : dark lazulite
Detailed sheet
lazulite
Not to be confused with lazurite, the main constituent of lapis lazuli. Lazulite is also called Klaprothite, in honor of the German mineralogist Klaproth (1743-1817) who discovered titanium and uranium, and described this stone. The name fell into disuse but it would avoid confusion between lazulite, lazurite, lapis lazuli and azurite.
The lazulite gets its name or from the old German “Lasurstein” for blue stone, or from the Arab-Persian “azul” for blue, because of its color. It forms a series with scorzalite, of which it is the magnesian pole.
CHEMICAL CHARACTERISTICS
MgAl2[PO4]2(OH)2
magnesium and aluminum phosphate
PHYSICAL CHARACTERISTICS
Main color
blue
Other colors
green
grass green variety found in 1994
Color of streak
white
Luster
vitreous
Hardness
5.0 to 6.0
Density
3.05 to 3.15
Cleavage
indistinct
Fracture
uneven
OPTICAL PROPERTIES
Transparency
opaque, translucent, transparent
very small transparent crystals
Refractive index
1.612 - 1.646
Double refraction
0.031
definite, biaxial (-)
visible double refraction
No
Dispersion
-
Pleochroism
very strong
Number of colors
2
colorless, deep blue
Fluorescence
none
CRYSTALS PROPERTIES
very rare, sharp pyramidal prisms
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in aluminous metamorphic rocks, such as quartzite and in some granitic pegmatites in Angola, Austria (Werfen, Salzburg), Canada (Yukon), Bolivia, Brazil (Minas Gerais), United States (North Carolina, Mountains Grave in Georgia), India, Madagascar, Sweden.
use in jewelry
Only the transparent crystals are cut, it is a collection stone
Historical
healing properties
it would have more or less the same effects of lapis lazuli
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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