stolzite
liquid inclusions in crystallizing gap
Detailed sheet
stolzite
Identified in 1845, its name honors the Czech mineralogist Joseph Alexis Stolz (1803-1896) who discovered it.
CHEMICAL CHARACTERISTICS
PbWO4
lead tungstate
PHYSICAL CHARACTERISTICS
Main color
yellow
Other colors
brown, orange, red, green
Color of streak
white
Luster
resinous
Hardness
2.5 to 3.0
Density
7.90 to 8.40
Cleavage
indistinct
Fracture
conchoidal
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
2.190 - 2.270
Double refraction
0.008
very weak, uniaxial (-)
visible double refraction
No
Dispersion
-
Pleochroism
absent
Number of colors
1
yellow stolzite spectrum system
Fluorescence
moderate
orange yellow
CRYSTALS PROPERTIES
tabular, massive dipyramidal prisms
crystals system
tetragonal
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in France in the Tarn at Castelnau de Brassac and at Echassières in Allier, in Tuscany, in Italy in Trentino, in Saxony and Bohemia (Germany), in Czech Republic, on the east coast of the United States , Peru (Palasca region), Kazakhstan.
use in jewelry
faceted for collection
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Gems
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