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0 item @ $0.00  

Mixed Minerals

Friday, 13 March 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including argentopyrite, cassiterite, and tetrahedrite and more from places like Jachymov, Erzgegirge, Bohemia, Czech Republic, Poldory Sett, United Downs, St. Day, Cornwall, England, and Herodsfoot mine, Liskeard, Cornwall, England.

Argentopyrite

#52367
Locality
Jachymov, Erzgegirge, Bohemia, Czech Republic 
Formula
AgFe2S3 
Availability
Available
Price
$30.00
Size
3 x 2 x 1 cm - Thumbnail 
Tagged
sulfide , silver  

Very tiny formless grains of Argentopyrite.


Argentopyrite

Formula
AgFe2S3 
Crystal System
Orthorhombic 
Cleavage
None, None, None 
Luster
Metallic 
Color
blue, bronze brown, green, yellow, white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
3.5-4 

Cassiterite

#52440
Locality
Poldory Sett, United Downs, St. Day, Cornwall, England 
Formula
SnO2 
Availability
Available
Price
$150.00
Size
7 x 5.5 x 5.5 cm - Sm Cabinet 
Tagged
tin  

Exceptionally well formed glassy brown crystals of Cassiterite to 2mm. 


Cassiterite

Formula
SnO2 
Crystal System
Tetragonal 
Crystal Habit
Prismatic, Massive, Botryoidal 
Cleavage
Perfect, Indistinct, None 
Luster
Adamantine 
Color
brown, brownish black, colorless, green, gray 
Streak
brownish white 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Irregular 
Hardness
6-7 

Tetrahedrite

#52458
Locality
Herodsfoot mine, Liskeard, Cornwall, England 
Formula
Cu12Sb4S13 
Availability
Available
Price
$35.00
Size
4 x 3.5 x 3 cm - Miniature 
Tagged
sulfide , copper  

4mm Tetrahedrite crystals probably coated with Chalcopyrite. 


Tetrahedrite

Formula
Cu12Sb4S13 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
iron gray, black, steel gray 
Streak
black 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 

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