petalite
petalite crystal from the Isle of Elba in Italy
smoked petalite from Mogok in Burma
solid and liquid like inclusions with tubes
solid like inclusion and split
solid type inclusions filling a tube
Detailed sheet
petalite
Its perfect cleavage that provides leaflets has earned it its name comingfrom the Greek “Petalon”.
It may exhibit the speckle type phenomenon called “cat’s eye”.
CHEMICAL CHARACTERISTICS
LiAl[Si4O10]
lithium aluminium silicate
PHYSICAL CHARACTERISTICS
Main color
pink
Other colors
yellow
Color of streak
white
Luster
pearly, vitreous
Hardness
6.0 to 6.5
Density
2.40 to 0.00
Cleavage
perfect
Fracture
conchoidal
pearly on the cleavage
OPTICAL PROPERTIES
Transparency
transparent
Refractive index
1.501 - 1.520
Double refraction
0.011
weak, biaxial (+)
visible double refraction
No
Dispersion
-
Pleochroism
absent
Number of colors
1
Absorption spectrum
454
Fluorescence
weak
orange, pink, depending on the origin
CRYSTALS PROPERTIES
rare thick shelves looking like feldspar
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Brazil (Minas Gerais), Isle of Elba, Sweden (Utö Island, Varuträsk), Zimbabwe, in Burma at Mogok …
use in jewelry
It is more a collection mineral than a gemstone
Historical
healing properties
When it’s pink , she would bring calm and serenity, this would be the stone of harmony.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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