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Rare Minerals

Sunday, 15 January 2023 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including adamite, babingtonite, bementite, callaghanite, chalcanthite, and cuzticite and more from places like Mina Ojuela, Mapimi, Durango, Mexico, Qiaojia Co., Zhaotong, Yunnan prov., China, N'Chwaning mines, Kuruman, Northern Cape prov., South Africa, Basic Refractories mine, Gabbs, Nye Co., Nevada, United States, White Canyon dist., San Juan Co., Utah, United States, and Bambollita mine, Moctezuma, Sonora, Mexico.

Adamite

(cuprian) - #60556
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
Zn2AsO4(OH) 
Availability
Sold
Size
5 x 2.3 x 2 cm - Miniature 
Tagged
arsenate  

It's hard to find these cuprian Adamites these days. This one is good with good crystals to 5mm.


Adamite

Formula
Zn2AsO4(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Druse, Encrustations 
Cleavage
One Good 
Luster
Vitreous - Resinous 
Color
yellow, green, violet, pink, yellowish green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
3.5 
Collection
William & Anne Cook Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Adamite
On Dakota Matrix
Other Available Adamite
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Babingtonite

on Prehnite - #60722
Locality
Qiaojia Co., Zhaotong, Yunnan prov., China 
Formula
Ca2Fe2+Fe3+Si5O14(OH) 
Availability
Available
Price
$45.00
Size
6.2 x 4.4 x 1 cm - Sm Cabinet 

Large black blocky Babingtonite crystals on green Prehnite. The Babingtonite crystals range from micros to 1.8cm.


Babingtonite

Formula
Ca2Fe2+Fe3+Si5O14(OH) 
Crystal System
Triclinic 
Crystal Habit
Druse, Radial 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous (Glassy) 
Color
brownish black, greenish black, black 
Streak
brown 
Class
Triclinic - Pinacoidal 
Fracture
Conchoidal 
Hardness
5.5-6 
SOLD
Bementite - BAC60571
Bementite - BAC60571

Bementite

#BAC60571
Locality
N'Chwaning mines, Kuruman, Northern Cape prov., South Africa 
Formula
Mn7Si6O15(OH)8 
Availability
Sold
Size
3 x 2 x 1.6 cm - Thumbnail 

Pearly creamy light brown crystal plates across face.


Bementite

Formula
Mn7Si6O15(OH)8 
Crystal System
Monoclinic 
Crystal Habit
Massive, Radial 
Cleavage
Perfect, Good, Good 
Luster
Vitreous (Glassy) 
Color
brown, gray, yellow, yellow brown, pink 
Streak
yellow white 
Class
Monoclinic - Prismatic 
Hardness
Collection
William & Anne Cook Collection
Mineralpedia
View Bementite
On Dakota Matrix
Previously Sold Bementite
On Dakota Matrix
Other Available Bementite
WebMineral
View Bementite
Mindat
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Callaghanite

with Hydromagnesite - #BAC60702
Locality
Basic Refractories mine, Gabbs, Nye Co., Nevada, United States 
Formula
Cu2Mg2CO3(OH)6·2H2
Availability
Sold
Size
4.5 x 3.5 x 2 cm - Miniature 
Tagged
carbonate , copper  
Special Info
Type Locality 

Deep blue crystals to less than 0.5mm with white Hydromagnesite.


Callaghanite

Formula
Cu2Mg2CO3(OH)6·2H2
Crystal System
Monoclinic 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous (Glassy) 
Color
azure, violet blue 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
3-3.5 
Collection
William & Anne Cook Collection
Special Info
Type Locality

Chalcanthite

#AH54790
Locality
White Canyon dist., San Juan Co., Utah, United States 
Formula
CuSO4·5H2
Availability
Sold
Size
7 x 7 x 1.5 cm - Sm Cabinet 
Tagged
copper  

Intense blue Chalcanthite in a vein 1cm thick.


Chalcanthite

Formula
CuSO4·5H2
Crystal System
Triclinic 
Crystal Habit
Encrustations, Stalactitic, Reniform 
Cleavage
Imperfect, Indistinct, Indistinct 
Luster
Vitreous (Glassy) 
Color
green, green blue, light blue, dark blue 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Conchoidal 
Hardness
2.5 
Collection
Arnold G Hampson Collection

Cuzticite

#BAC60705
Locality
Bambollita mine, Moctezuma, Sonora, Mexico 
Formula
Fe3+2Te6+O6·3H2
Availability
Sold
Size
2.5 x 1.5 x 1 cm - Thumbnail 
Tagged
tellurium  
Special Info
Type Locality 

Yellowish brown scales. Excalibur label.


Cuzticite

Formula
Fe3+2Te6+O6·3H2
Crystal System
Hexagonal 
Crystal Habit
Encrustations, Scaly, Stalactitic 
Cleavage
Good, None, None 
Luster
Adamantine 
Color
brown, brownish yellow, yellow 
Class
Hexagonal 
Hardness
Collection
William & Anne Cook Collection
Special Info
Type Locality

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