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0 item @ $0.00  

Micromounts

Friday, 30 June 2023 01:30 PM

Introducing the "Micromounts" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including jeanbandyite, kleinite, liroconite, microlite, orpiment, and polybasite and more from places like Siglo Veinte mine, Llallagua, Bolivia, McDermitt mine, Humboldt Co., Nevada, United States, Cornwall, England, Rutherford mines, Amelia Co., Virginia, United States, Boron, Kern Co., California, United States, and Arizpe, Sonora, Mexico.

Jeanbandyite

with Stannite - #61795
Locality
Siglo Veinte mine, Llallagua, Bolivia 
Formula
(Fe3+,Mn2+)Sn4+(OH,O)6 
Availability
Sold
Size
Micromount 
Tagged
tin  
Special Info
Type Locality 

A choice specimen with dozens of Jeanbandyite crystals to ablut 0.3mm on Stannite.


Jeanbandyite

Formula
(Fe3+,Mn2+)Sn4+(OH,O)6 
Crystal System
Tetragonal 
Crystal Habit
Crystalline - Coarse, Striated, Pseudo Octohedral 
Cleavage
Good, Fair, None 
Luster
Vitreous - Adamantine 
Color
brown orange, red brown, pale yellow 
Streak
light yellow 
Class
Tetragonal - Dipyramidal 
Hardness
3.5 
Special Info
Type Locality

Kleinite

#61792
Locality
McDermitt mine, Humboldt Co., Nevada, United States 
Formula
Hg2N(Cl,SO4)·nH2
Availability
Sold
Size
Micromount 

Orange, glassy Kleinite with several 1mm or so stubby crystals in the crevice not captured in photos. Personally, I have not seen crystals of Kleinite this nice.  Very nice piece and well mounted. Overall 8 x 7mm.


Kleinite

Formula
Hg2N(Cl,SO4)·nH2
Crystal System
Hexagonal 
Crystal Habit
Prismatic 
Cleavage
Good, None, None 
Luster
Adamantine 
Color
yellow, orange 
Streak
yellow 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle 
Hardness
3.5 
Mineralpedia
View Kleinite
On Dakota Matrix
Previously Sold Kleinite
On Dakota Matrix
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Mindat
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Liroconite

#61826
Locality
Cornwall, England 
Formula
Cu2AlAsO4(OH)4·4H2
Availability
Sold
Size
Micromount 
Tagged
arsenate , copper  

Deep glassy blue crystals to 4mm with Quartz.


Liroconite

Formula
Cu2AlAsO4(OH)4·4H2
Crystal System
Monoclinic 
Crystal Habit
Euhedral Crystals, Granular 
Cleavage
Indistinct, Indistinct, None 
Luster
Vitreous - Resinous 
Color
light blue, green, sky blue, verdigris green 
Streak
light blue 
Class
Monoclinic - Prismatic 
Fracture
Sub Conchoidal 
Hardness
2-2.5 

Microlite

#61794
Locality
Rutherford mines, Amelia Co., Virginia, United States 
Formula
(Ca,Na)2Ta2(O,OH,F)7 
Availability
Sold
Size
Micromount 
Tagged
pegmatite mineral  

For the species, this Microlite crystal is large and measures 1.4 x 1.5cm. An excellent octahedral crystal nicely mounted and as seen in the photos can easily be removed out of the  micromount box for photographing and study.


Microlite

Formula
(Na,Ca)2Ta2O6(O,OH,F) 
Crystal System
Isometric 
Crystal Habit
Disseminated, Pseudo Octohedral 
Cleavage
Indistinct, Indistinct, Indistinct 
Luster
Vitreous - Resinous 
Color
yellowish brown, reddish brown, greenish brown, green, gray 
Streak
light yellow 
Class
Isometric - Hexoctahedral 
Fracture
Sub Conchoidal 
Hardness
5-5.5 
Mineralpedia
View Microlite
On Dakota Matrix
Previously Sold Microlite
On Dakota Matrix
Other Available Microlite
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Mindat
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Orpiment

in Colemanite - #61809
Locality
Boron, Kern Co., California, United States 
Formula
As2S3 
Availability
Sold
Size
Micromount 
Tagged
sulfide  

Mostly opaque Orpiment included Colemanite. The largest crystal measue 6mm. Stunning specimen. Overall 2x2cm.


Orpiment

Formula
As2S3 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Massive - Fibrous, Foliated 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
lemon yellow, brownish yellow, orange yellow 
Streak
pale yellow 
Class
Monoclinic - Prismatic 
Fracture
Sectile 
Hardness
1.5-2 
Mineralpedia
View Orpiment
On Dakota Matrix
Previously Sold Orpiment
On Dakota Matrix
Other Available Orpiment
WebMineral
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Mindat
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Polybasite

#61798
Locality
Arizpe, Sonora, Mexico 
Formula
Cu(Ag,Cu)6Ag9Sb2S11 
Availability
Sold
Size
Micromount 
Tagged
sulfide , copper , silver  

Numerous 1 to 2mm striated crystals of Polybasite. 


Polybasite

Formula
Cu(Ag,Cu)6Ag9Sb2S11 
Crystal System
Monoclinic 
Crystal Habit
Massive - Granular, Granular, Pseudo Hexagonal 
Cleavage
Poor, None, None 
Luster
Sub Metallic 
Color
black, dark ruby red 
Streak
reddish black 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
2.5-3 

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