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Mixed Rare Minerals

Saturday, 07 May 2022 12:00 PM

Introducing the "Mixed Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including attakolite, chalcopyrite, coronadite, cuproromeite, eosphorite, and mimetite and more from places like Västanå Iron mine, Näsum, Bromölla, Skåne, Sweden, Sweetwater mine, Viburnum Trend, Reynolds Co., Missouri, United States, South mine, Broken Hill, New South Wales, Australia, Comanche mine, Mono Co., California, United States, Foote mine, Cleveland Co., North Carolina, United States, and Dry Gill mine, Caldbeck Fells, Cumbria, England.

Attakolite

with Hematite - #AK58405
Locality
Västanå Iron mine, Näsum, Bromölla, Skåne, Sweden 
Formula
CaMn2+Al4(HSiO4)(PO4)3(OH)4 
Availability
Available
Price
$120.00
Size
4 x 2.5 x 1.3 cm - Miniature 

Crystalline mass of light green to flesh color Attakolite, a three locality mineral.


Attakolite

Formula
CaMn2+Al4(HSiO4)(PO4)3(OH)4 
Crystal System
Monoclinic 
Crystal Habit
Massive 
Color
white, pink, pale red 
Class
Monoclinic - Prismatic 
Hardness
Collection
Al Kidwell Collection

Chalcopyrite

with Dolomite & Galena - #AH58197
Locality
Sweetwater mine, Viburnum Trend, Reynolds Co., Missouri, United States 
Formula
Cu1+Fe3+S2 
Availability
Available
Price
$85.00
Size
8 x 4.5 x 4.5 cm - Sm Cabinet 
Tagged
sulfide , copper  

Excellent combination specimen loaded with octahedral Galena crystals to 1cm on white Dolomite. Sprinkled about the specimen are nice 1-3mm golden Chalcopyrite crystals.


Chalcopyrite

Formula
Cu1+Fe3+S2 
Crystal System
Tetragonal 
Crystal Habit
Euhedral Crystals, Striated, Druse 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
brass yellow, honey yellow 
Streak
greenish black 
Class
Tetragonal - Scalenohedral 
Fracture
Brittle 
Hardness
3.5 
Collection
Arnold G Hampson Collection

Coronadite

#58435
Locality
South mine, Broken Hill, New South Wales, Australia 
Formula
PbMn4+2Mn2+6O16 
Availability
Available
Price
$75.00
Size
8 x 4.5 x 4 cm - Sm Cabinet 

A cool black botryoidal crystal aggregates to 8mm. 


Coronadite

Formula
PbMn4+2Mn2+6O16 
Crystal System
Monoclinic 
Crystal Habit
Fibrous, Botryoidal 
Luster
Sub Metallic 
Color
grayish black, dark gray, black 
Streak
brownish black 
Class
Monoclinic - Prismatic 
Hardness
4.5-5 

Cuproromeite

aka Partzite - #58429
Locality
Comanche mine, Mono Co., California, United States 
Formula
Cu2Sb2(O,OH)7 
Availability
Available
Price
$40.00
Size
4.5 x 3 x 1.5 cm - Miniature 
Tagged
copper  

Partzite is not an actual IMA mineral. Instead they think that it is very similar to Cuproromeite. Scratching the metallic areas does produce a dark green color and its streak is dark olive green. The metallic large grain is 1.5cm and is probably tarnished.


Collection
RC Stamberg Collection

Eosphorite

#RS58440
Locality
Foote mine, Cleveland Co., North Carolina, United States 
Formula
Mn2+AlPO4(OH)2·H2
Availability
Available
Price
$125.00
Size
5 x 3 x 0.5 cm - Miniature 
Tagged
phosphate , pegmatite mineral  

Beautiful orange crystal group of Eosphorite about 1mm with great coverage. Excellent specimen.


Eosphorite

Formula
Mn2+AlPO4(OH)2·H2
Crystal System
Orthorhombic 
Crystal Habit
Massive - Fibrous, Prismatic, Striated 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Resinous 
Color
light pink, yellow brown, light brown, light yellow, colorless 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal - Uneven 
Hardness
Collection
RC Stamberg Collection

Mimetite

var. campylite - #57823
Locality
Dry Gill mine, Caldbeck Fells, Cumbria, England 
Formula
Pb5(AsO4)3Cl 
Availability
Available
Price
$75.00
Size
5.5 x 3 x 3 cm - Sm Cabinet 
Tagged
arsenate  

Burnt orange curled hexagonal crystyals to 2mm across face. Nice piece!


Mimetite

Formula
Pb5(AsO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Reniform, Globular, Prismatic 
Cleavage
Imperfect, None, None 
Luster
Adamantine - Resinous 
Color
white, yellow, orange, brown, red 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
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