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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 coronadite, cuproromeite, eosphorite, mimetite, pseudomalachite, and silver and more from places like South mine, Broken Hill, New South Wales, Australia, Comanche mine, Mono Co., California, United States, Foote mine, Cleveland Co., North Carolina, United States, Dry Gill mine, Caldbeck Fells, Cumbria, England, Erl, Kasbach-Ohlenberg, Linz am Rhein, Rhineland-Palatinate, Germany, and Kongsberg dist., Buskerud, Norway.

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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Pseudomalachite

with Copper - #RS58168
Locality
Erl, Kasbach-Ohlenberg, Linz am Rhein, Rhineland-Palatinate, Germany 
Formula
Cu5(PO4)2(OH)4 
Availability
Available
Price
$85.00
Size
8.5 x 4 x 5 cm - Sm Cabinet 
Tagged
phosphate , copper  

A great locality specimen of pseudomalachite in a large 3.5cm cavity in Quartz. Interesting that there are Copper crystals at the center of the specimen.


Pseudomalachite

Formula
Cu5(PO4)2(OH)4 
Crystal System
Monoclinic 
Crystal Habit
Botryoidal, Massive, Stalactitic 
Cleavage
Imperfect, None, None 
Luster
Vitreous - Greasy 
Color
blue green, green, dark green, black green 
Streak
bluish green 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
4-5 
Collection
RC Stamberg Collection

Silver

#58432
Locality
Kongsberg dist., Buskerud, Norway 
Formula
Ag 
Availability
Available
Price
$295.00
Size
6 x 5 x 3 cm - Sm Cabinet 
Tagged
native element  

An awesome specimen with two groups of Silver crystals. The longest is 3cm and the other is a group 1.3cm across.


Silver

Formula
Ag 
Crystal System
Isometric 
Crystal Habit
Arborescent, Dendritic, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
silver white, gray white, gray 
Streak
silver white 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
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