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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!

Molybdophyllite

#46790
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
Pb2Mg2Si2O7(OH)2 
Availability
Sold
Size
3.5 x 2 x 1.5 cm - Miniature 

Colorless micaceous looking plates to 3mm.


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 

Pinakiolite

with Hausmannite - #PD46952
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
(Mg,Mn2+)2(Mn3+,Sb5+)O2(BO3
Availability
Sold
Size
6 x 4 x 2 cm - Sm Cabinet 
Special Info
Type Locality 

Black bladed crystals from 1-3mm with Hausmannite in matrix.


Pinakiolite

Formula
(Mg,Mn2+)2(Mn3+,Sb5+)O2(BO3
Crystal System
Monoclinic 
Crystal Habit
Tabular 
Cleavage
Good, None, None 
Luster
Adamantine - Metallic 
Color
black 
Streak
brown gray 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
Collection
Phillips Collection
Special Info
Type Locality

Pyrobelonite

#41258
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
PbMn2+VO4(OH) 
Availability
Sold
Size
1.1 x 1.3 x 1.1 cm - Thumbnail 
Special Info
Antique Specimen 
Special Info
Type Locality 

Deep red tiny prismatic crystals. The red can be seen within the Calcite as inclusions. Out of the Calcite the red is too dark to see. The longest crystal is 1mm and then there is one other outside of the Calcite. It is an old, historic specimen, with an old hand-written label, which indicates is from the Japan workings. There are Haussmanite crystals all over the matrix. There are also an unknown, acicular spray of crystals. Excellent old specimen.


Pyrobelonite

Formula
PbMn2+VO4(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Acicular 
Cleavage
None, None, None 
Luster
Adamantine 
Color
dark red 
Streak
red orange 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
3.5 
Special Info
Antique Specimen
Special Info
Type Locality

Pyrophanite

#41257
Locality
Harstigen mine, Filipstad, Värmland, Sweden 
Formula
Mn2+TiO3 
Availability
Sold
Size
Chip < 1cm 

Please note this is a Harstigen mine specimen. The label indicates that it is a portion of the type specimen from the British Museum. I acquired it from Dr. Georg Gebhard. This is a small 4mm specimen, but packs at least three minerals. The Pyrophanite crystals look pseudo-octahedral with triangular faces. There are deep red, micaceous looking plates that may be Dixenite, but could also be several other minerals. There are also colorless, acicular crystals. Interesting and potentially good specimen, but the identity needs verification since it is a "portion" of the type. 


Pyrophanite

Formula
Mn2+TiO3 
Crystal System
Trigonal 
Crystal Habit
Scaly, Platy 
Cleavage
Perfect, None, None 
Luster
Sub Metallic 
Color
blood red, green yellow, dark red 
Streak
ochre yellow 
Class
Trigonal - Rhombohedral 
Fracture
Brittle - Conchoidal 
Hardness

Quenselite

with Hausmannite - #46794
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
PbMn3+O2(OH) 
Availability
Sold
Size
3 x 2 x 2 cm - Thumbnail 
Special Info
Type Locality 

Black lustrous, striated crystals of Quenselite to 1mm. There are at least two crystals.


Quenselite

Formula
PbMn3+O2(OH) 
Crystal System
Monoclinic 
Cleavage
Perfect, None, None 
Luster
Earthy (Dull) 
Color
pitch black 
Streak
dark brownish gray 
Class
Monoclinic - Sphenoidal 
Fracture
Flexible 
Hardness
2.5 
Special Info
Type Locality

Welshite

#46968
Locality
Långban, Filipstad, Värmland, Sweden 
Formula
Ca4(Mg9Sb5+3)O4[Si6Be3AlFe3+2O36
Availability
Sold
Size
4 x 3 x 3.5 cm - Miniature 
Special Info
Type Locality 

Two 1mm deep red prismatic crystals in matrix. One is quite nice.


Welshite

Formula
Ca4(Mg9Sb5+3)O4[Si6Be3AlFe3+2O36
Crystal System
Triclinic 
Crystal Habit
Prismatic 
Cleavage
None, None, None 
Luster
Subadamantine 
Color
brown, reddish black, orange brown, deep tan 
Streak
light brown 
Class
Triclinic - Pedial 
Fracture
Conchoidal 
Hardness
Special Info
Type Locality
On Dakota Matrix
Previously Sold Welshite
On Dakota Matrix
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