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1 item @ $40.00  

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 andersonite, arthurite, azurite, beryl, and boleite and more from places like Ambrosia Lake dist., McKinley Co., New Mexico, United States, Majuba Hill mine, Pershing Co., Nevada, United States, Tynagh mine, Killimor, Co., Galway, Ireland, Chivor mine, Boyaca dept., Colombia, Wah Wah Mts, Beaver Co., Utah, United States, and Amelia mine, Boleo, Santa Rosalia, Baja California, Mexico.

SOLD
Andersonite - 61821
Andersonite - 61821

Andersonite

#61821
Locality
Ambrosia Lake dist., McKinley Co., New Mexico, United States 
Formula
Na2Ca(UO2)(CO3)3·6H2
Availability
Sold
Size
Micromount 
Tagged
carbonate  

A crystal group of spheroidal Andersonite 4mm across exhibiting fluorescent yellow color under all lights.


Andersonite

Formula
Na2Ca(UO2)(CO3)3·6H2
Crystal System
Trigonal 
Crystal Habit
Druse, Rhombohedral Crystals, Pseudo Cubic 
Luster
Vitreous - Pearly 
Color
bright yellow green, green 
Class
Trigonal - Rhombohedral 
Hardness
2.5 

Arthurite

#61891
Locality
Majuba Hill mine, Pershing Co., Nevada, United States 
Formula
CuFe3+2(AsO4)2(OH)2·4H2
Availability
Sold
Size
Micromount 
Tagged
arsenate , copper  

Lime green Arthurite crystals less than 0.3mm.


Arthurite

Formula
CuFe3+2(AsO4)2(OH)2·4H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Acicular, Spherical 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
apple green, emerald green 
Streak
light green 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
3-4 
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Azurite

with Malachite - #61892
Locality
Tynagh mine, Killimor, Co., Galway, Ireland 
Formula
Cu3(CO3)2(OH)2 
Availability
Sold
Size
Micromount 
Tagged
carbonate , copper  

Lustrous Azurite with minor Malachite.


Azurite

Formula
Cu3(CO3)2(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Tabular, Prismatic, Stalactitic 
Cleavage
Perfect, Fair, None 
Luster
Vitreous (Glassy) 
Color
azure blue, blue, light blue, dark blue 
Streak
light blue 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
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Beryl

var. emerald - #61803
Locality
Chivor mine, Boyaca dept., Colombia 
Formula
Be3Al2Si6O18 
Availability
Sold
Size
Micromount 
Tagged
beryllium  
Special Info
Gem Quality 

Gemmy green doubly terminated crystal to 9mm.


Beryl

Formula
Be3Al2Si6O18 
Crystal System
Hexagonal 
Crystal Habit
Crystalline - Coarse, Prismatic, Columnar 
Cleavage
Imperfect, None, None 
Luster
Vitreous - Resinous 
Color
green, blue, yellow, colorless, pink 
Streak
white 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
7.5-8 
Special Info
Gem Quality
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Beryl

var. red - #61804
Locality
Wah Wah Mts, Beaver Co., Utah, United States 
Formula
Be3Al2Si6O18 
Availability
Sold
Size
Micromount 
Tagged
beryllium  

Professionally mounted red Beryl crystal 4mm across.


Beryl

Formula
Be3Al2Si6O18 
Crystal System
Hexagonal 
Crystal Habit
Crystalline - Coarse, Prismatic, Columnar 
Cleavage
Imperfect, None, None 
Luster
Vitreous - Resinous 
Color
green, blue, yellow, colorless, pink 
Streak
white 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
7.5-8 
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Boleite

#61890
Locality
Amelia mine, Boleo, Santa Rosalia, Baja California, Mexico 
Formula
KAg9Pb26Cu24Cl62(OH)48 
Availability
Sold
Size
Micromount 
Tagged
copper  

A 5mm deep blue, cubic Boleite crystal.


Boleite

Formula
KAg9Pb26Cu24Cl62(OH)48 
Crystal System
Isometric 
Crystal Habit
Pseudo Cubic 
Cleavage
Perfect, Good, None 
Luster
Vitreous - Pearly 
Color
indigo blue, light blue 
Streak
light green 
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
3-3.5 
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