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Sternbergite

#RW47521

Sternbergite

#RW47521
Availability
Sold
Size
1.8 x 1.0 x 1.0 cm - Thumbnail 
Formula
AgFe2S3 (RRUFF)
Locality
Jachymov, Erzgegirge, Bohemia, Czech Republic
Tagged
sulfide , silver

Purchased by Waidler from Rob Lavinsky several years ago, this specimen is small but boast incredible pseudohexagonal thin rosette-like groups of crystals. At the right angles and with enough light you will see dark red-purple reflections, which apparently is a tarnish. I thought these were deep red internal reflections seen in silver sulfosalts. These are actually tarnished outer reflections typical of Sternbergite. Otherwise, is has a brilliant reflective metallic luster with black to dark grey color with mild iridescences of other colors. The largest crystal is 3-5mm across depending how you measure it. There are numerous other crystals.

Type locality.

Sternbergite

Formula
AgFe2S3 
Crystal System
Orthorhombic 
Crystal Habit
Radial, Twinning Common 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
blue violet, golden brown 
Streak
black 
Class
Orthorhombic - Dipyramidal 
Fracture
Flexible 
Hardness
1-1.5 

Data courtesy of Webmineral.

Collection
Robert J. Waidler Collection

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