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0 item @ $0.00  

Rare Mineral Species of Langban & Harstigen, Sweden

Tuesday, 30 May 2017 06:30 PM

Somewhat kin to Franklin in terms of geology and mineralization, this area is also famous for its rare species. We will have some older material available. It's in short supply!

SOLD
Kentrolite - DS46941
Kentrolite - DS46941

Kentrolite

#DS46941
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
Pb2Mn3+2O2(Si2O7
Availability
Sold
Size
6 x 3.5 x 2.5 cm - Sm Cabinet 

1-3mm rounded crystal grains with deep red internal reflections. Very rich specimen.


Kentrolite

Formula
Pb2Mn3+2O2(Si2O7
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Crystalline - Fine, Wheat Sheaf 
Cleavage
Distinct, None, None 
Luster
Sub Metallic 
Color
dark reddish brown, reddish black 
Streak
dark brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
Collection
Shultz Collection

Magnesioferrite

#DS46938
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
MgFe3+2O4 
Availability
Sold
Size
5.5 x 2.5 x 3 cm - Sm Cabinet 

Black crystal grains of Magnesioferrite to 1mm. Rich.


Magnesioferrite

Formula
MgFe3+2O4 
Crystal System
Isometric 
Crystal Habit
Crystalline - Fine, Massive - Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
brownish black, black 
Streak
dark red 
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
6-6.5 
Collection
Shultz Collection

Magnetoplumbite

with Braunite - #DS46943
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
PbFe3+12O19 
Availability
Sold
Size
6.5 x 5 x 2 cm - Sm Cabinet 
Special Info
Type Locality 

Black grains of Magnetoplumbite to 4mm.


Magnetoplumbite

Formula
PbFe3+12O19 
Crystal System
Hexagonal 
Crystal Habit
Massive - Granular 
Cleavage
Good, None, None 
Luster
Metallic 
Color
grayish black, black 
Streak
dark brown 
Class
Hexagonal - Dihexagonal Dipyramidal 
Hardness
Collection
Shultz Collection
Special Info
Type Locality
SOLD
Magnussonite - PD46956
Magnussonite - PD46956

Magnussonite

#PD46956
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
Mn2+5As3+3O9(OH,Cl) 
Availability
Sold
Size
Chip < 1cm 
Special Info
Type Locality 

Green crystalline on 8mm piece. 


Magnussonite

Formula
Mn2+5As3+3O9(OH,Cl) 
Crystal System
Isometric 
Luster
Vitreous (Glassy) 
Color
blue green, grass green, dark red 
Streak
white 
Class
Isometric - Hexoctahedral 
Hardness
3.5-4 
Collection
Phillips Collection
Special Info
Type Locality

Melanotekite

#DS46936
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
Pb2Fe3+2O2Si2O7 
Availability
Sold
Size
3 x 3.5 x 1.5 cm - Miniature 
Special Info
Type Locality 

Black, dull, ugly mass.


Melanotekite

Formula
Pb2Fe3+2O2Si2O7 
Crystal System
Orthorhombic 
Crystal Habit
Massive, Prismatic 
Cleavage
Good, None, None 
Luster
Sub Metallic 
Color
black, blackish gray 
Streak
greenish 
Class
Orthorhombic - Disphenoidal 
Hardness
6.5 
Collection
Shultz Collection
Special Info
Type Locality

Molybdophyllite

#46795
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
Pb2Mg2Si2O7(OH)2 
Availability
Sold
Size
3 x 2.5 x 2 cm - Thumbnail 

Rich specimen with several excellent colorless plates of Molybdophyllite to 3mm. The specimen is from the Natural History Museum of Riksmuseet with a note on the back stating that it  was collected by KJ Finnenman...


Molybdophyllite

Formula
Pb2Mg2Si2O7(OH)2 
Crystal System
Hexagonal 
Crystal Habit
Massive - Lamellar 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
colorless, pale green, pale yellow 
Streak
white 
Class
Hexagonal - Trapezohedral 
Hardness
3-4 

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