wavellite
wawelite from Hot Springs in the Arkansas in the U.S.
radial wavelite structure
Detailed sheet
wavellite
Discovered in 1805 in England, its name honors the English physician William Wavell (1750-1829).
CHEMICAL CHARACTERISTICS
Al3[PO4]2(OH,F)3 - 5(H2O)
hydrated aluminum phosphate
PHYSICAL CHARACTERISTICS
Main color
green
Other colors
white, blue, brown, yellow
Color of streak
white
Luster
greasy, pearly
Hardness
3.5 to 4.0
Density
2.36 to 0.00
Cleavage
perfect
Fracture
uneven
pearly cleavage
OPTICAL PROPERTIES
Transparency
transparent
Refractive index
1.520 - 1.560
Double refraction
0.025
definite, biaxial positive
visible double refraction
Yes
Dispersion
-
Pleochroism
weak
Number of colors
2
yellow, green
Fluorescence
none
CRYSTALS PROPERTIES
radial groups of crystals
crystals system
orthorhombic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in the Potosi mines in Bolivia, in the United States (California, Arizona, Nevada, Arkansas, New Mexico, Virginia, Pennsylvania), in Germany, Slovakia, Hungary, China.
use in jewelry
collection stone cut in facets or cabochon
Other
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