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Rare Minerals Specimens

Tuesday, 24 January 2023 04:00 PM

Introducing the "Rare Minerals Specimens" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including petalite, pyrargyrite, rouaite, saneroite, santarosaite, and theresemagnanite and more from places like Tanco pegmatite, Bernic Lake, Manitoba, Canada, Montezuma, Summit Co., Colorado, United States, Coquimbo, Chile, Fianel mine, Ausserferrera, Ferrera, Viamala, Grisons, Switzerland, Santa Rosa mine, Iquique, Tarapacá Region, Chile, and Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France.

Petalite

#DL60768
Locality
Tanco pegmatite, Bernic Lake, Manitoba, Canada 
Formula
LiAlSi4O10 
Availability
Sold
Size
15 x 9 x 2.5 cm - Cabinet 
Tagged
pegmatite mineral , lithium  

Large chunk of Petalite with an interesting pearly luster. Petalite has a basal cleavage and is seen on this specimen as a somewhat undulating suface and not as good flat plane. It is less dense than Quartz and Pollucite and feels light in-hand. The specimen is from the Dr. David H. London collection. I obtained the bulk of his research pegmatite collection and many of the specimens are illustrated in his "Pegmatites" book. Most of the specimens will be show cased on a Special Edition later this year.


Petalite

Formula
LiAlSi4O10 
Crystal System
Monoclinic 
Crystal Habit
Massive 
Cleavage
Perfect, Imperfect, None 
Luster
Vitreous - Pearly 
Color
colorless, gray, yellow, yellow gray, white 
Streak
colorless 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
6-6.5 
Collection
Dr. David London Collection
Mineralpedia
View Petalite
On Dakota Matrix
Previously Sold Petalite
On Dakota Matrix
Other Available Petalite
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Pyrargyrite

with Acanthite - #RS60902
Locality
Montezuma, Summit Co., Colorado, United States 
Formula
Ag3SbS3 
Availability
Sold
Size
5 x 5 x 4 cm - Miniature 
Tagged
sulfide , silver  

Dull massive Acanthite with massive Pyrargyrite and wire Silver.


Pyrargyrite

Formula
Ag3SbS3 
Crystal System
Trigonal 
Crystal Habit
Massive, Crystalline - Poor, Prismatic 
Cleavage
Poor, None, None 
Luster
Sub Metallic 
Color
deep red, red gray 
Streak
cherry red 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Brittle - Conchoidal 
Hardness
2.5 
Collection
RC Stamberg Collection

Rouaite

with Cuprite on Copper - #BAC60760
Locality
Coquimbo, Chile 
Formula
Cu2NO3(OH)3 
Availability
Sold
Size
3 x 3 x 1 cm - Thumbnail 
Tagged
copper  

Dull earthy green Rouaite on Copper with Cuprite. There is a bit of good information on the Gunnar Farber label with the specimen. Gunnar states that this specimen is from an old museum, although he does not state what museum.


Rouaite

Formula
Cu2NO3(OH)3 
Crystal System
Monoclinic 
Crystal Habit
Euhedral Crystals, Aggregates, Equant Grains 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
dark emerald green 
Streak
green 
Class
Monoclinic - Sphenoidal 
Fracture
Splintery 
Hardness
Collection
William & Anne Cook Collection
Mineralpedia
View Rouaite
On Dakota Matrix
Previously Sold Rouaite
On Dakota Matrix
Other Available Rouaite
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Mindat
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Saneroite

#BAC60767
Locality
Fianel mine, Ausserferrera, Ferrera, Viamala, Grisons, Switzerland 
Formula
Na2(Mn2+,Mn3+)10V5+Si11O34(OH)4 
Availability
Available
Price
$50.00
Size
1.5 x 2.5 x 3 cm - Thumbnail 
Tagged
vanadium  

Fiery orange red crystal grains to 2mm in a mass 2.2 x 1cm.


Saneroite

Formula
Na2(Mn2+,Mn3+)10V5+Si11O34(OH)4 
Crystal System
Triclinic 
Crystal Habit
Tabular, Aggregates 
Cleavage
Perfect, Perfect, None 
Luster
Resinous - Greasy 
Color
light orange 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
6-7 
Collection
William & Anne Cook Collection
Mineralpedia
View Saneroite
On Dakota Matrix
Previously Sold Saneroite
On Dakota Matrix
Other Available Saneroite
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Mindat
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Santarosaite

#BAC60764
Locality
Santa Rosa mine, Iquique, Tarapacá Region, Chile 
Formula
CuB2O4 
Availability
Sold
Size
2.3 x 2 x 2 cm - Thumbnail 
Tagged
copper  
Special Info
Type Locality 

Beady blue crystals across face. Very rich specimen.


Santarosaite

Formula
CuB2O4 
Crystal System
Tetragonal 
Crystal Habit
Globular 
Color
vivid blue 
Streak
pale blue 
Class
Tetragonal - Scalenohedral 
Hardness
Collection
William & Anne Cook Collection
Special Info
Type Locality
SOLD
Theresemagnanite - BAC60765
Theresemagnanite - BAC60765

Theresemagnanite

#BAC60765
Locality
Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France 
Formula
Co6SO4(OH)10·8H2
Availability
Sold
Size
1 x 0.6 x 0.8 cm - Thumbnail 
Special Info
Type Locality 

Well, there's no real good crystals on this specimen, only purplish scales and coatings. Maybe I need a new microscope!


Theresemagnanite

Formula
Co6SO4(OH)10·8H2
Crystal System
Hexagonal 
Crystal Habit
Thin, Platy, Spherical 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
pink, light pink 
Streak
white 
Class
Hexagonal - Pyramidal 
Fracture
Irregular 
Hardness
1.5-2 
Collection
William & Anne Cook Collection
Special Info
Type Locality

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