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Mixed Minerals

Sunday, 11 July 2021 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including ajoite, atacamite, azurite, baryte, bertrandite, and calcite and more from places like Ajo, Pima Co., Arizona, United States, La Farola mine, Tierra Amarilla, Copiapó, Chile, Big Indian Copper mine, San Juan Co., Utah, United States, near Norman, Cleveland Co., Oklahoma, United States, Kara-Oba W deposit, Betpakdala Desert, Karagandy, Kazakhstan, and Fish Island, Great Cut, Dolores Co., Colorado, United States.

Ajoite

#AH56047
Locality
Ajo, Pima Co., Arizona, United States 
Formula
Na3Cu2+20Al3Si29O76(OH)16·8H2
Availability
Sold
Size
8.5 x 6 x 4 cm - Sm Cabinet 
Tagged
copper  
Special Info
Type Locality 

Green, thin bladed Ajoite crystals. Good coverage.


Ajoite

Formula
Na3Cu2+20Al3Si29O76(OH)16·8H2
Crystal System
Triclinic 
Crystal Habit
Massive, Lath, Platy 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
blue green 
Streak
greenish white 
Class
Triclinic - Pinacoidal 
Hardness
Collection
Arnold G Hampson Collection
Special Info
Type Locality
Mineralpedia
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On Dakota Matrix
Previously Sold Ajoite
On Dakota Matrix
Other Available Ajoite
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Mindat
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Atacamite

#55152
Locality
La Farola mine, Tierra Amarilla, Copiapó, Chile 
Formula
Cu2Cl(OH)3 
Availability
Sold
Size
15 x 9 x 7 cm - Cabinet 
Tagged
copper  

Large cabinet specimen with superb emerald green, free-standing bladed crystals of Atacamite to 5mm. 


Atacamite

Formula
Cu2Cl(OH)3 
Crystal System
Orthorhombic 
Crystal Habit
Euhedral Crystals, Fibrous, Granular 
Cleavage
Perfect, None, None 
Luster
Adamantine 
Color
green, yellow, yellow green, black green 
Streak
apple green 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
3-3.5 
Collection
Arnold G Hampson Collection
Mineralpedia
View Atacamite
On Dakota Matrix
Previously Sold Atacamite
On Dakota Matrix
Other Available Atacamite
WebMineral
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Mindat
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Azurite

with Malachite - #AH56054
Locality
Big Indian Copper mine, San Juan Co., Utah, United States 
Formula
Cu3(CO3)2(OH)2 
Availability
Sold
Size
7 x 8 x 4 cm - Sm Cabinet 
Tagged
carbonate , copper  

Sandstone with areas of green Malachite and blue spots of Azurite.


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 
Collection
Arnold G Hampson Collection
Mineralpedia
View Azurite
On Dakota Matrix
Previously Sold Azurite
On Dakota Matrix
Other Available Azurite
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Mindat
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Baryte

rose - #48540
Locality
near Norman, Cleveland Co., Oklahoma, United States 
Formula
BaSO4 
Availability
Available
Price
$215.00
Size
14 x 8 x 7 cm - Cabinet 

Nice set of brick red rose Baryte crystals. The laregest "rose" is 7cm across. The place is closed to collecting.

This occurence is one of the more unique localities for the oddities of mineral world. Here barium mineralization penetrated the Permian Garber Sandstone along fractures sets and formed rose-like clusters of Baryte (Barite) crystals. Individual crystals form saucer shaped crystals with sand inclucions from the the Graber Sandstone. Trace Hematite imparts the red coloration. This specimen is from Dr. David London's collection, who wrote a thorough article on this occurence in the July/August 2008 issue of the Mineralogical Record.  


Baryte

Formula
BaSO4 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Prismatic, Massive - Fibrous 
Cleavage
Perfect, Perfect, Imperfect 
Luster
Vitreous (Glassy) 
Color
white, yellowish white, grayish white, brownish white, dark brown 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
3-3.5 
Mineralpedia
View Baryte
On Dakota Matrix
Previously Sold Baryte
On Dakota Matrix
Other Available Baryte
WebMineral
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Mindat
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Bertrandite

with Pyrite - #52610
Locality
Kara-Oba W deposit, Betpakdala Desert, Karagandy, Kazakhstan 
Formula
Be4Si2O7(OH)2 
Availability
Sold
Size
2.5 x 2 x 1.5 cm - Thumbnail 
Tagged
beryllium , pegmatite mineral  

Large crystal blades of Bertrandite to 2.5cm!


Bertrandite

Formula
Be4Si2O7(OH)2 
Crystal System
Orthorhombic 
Crystal Habit
Crystalline - Fine, Tabular, Prismatic 
Cleavage
Perfect, Distinct, Distinct 
Luster
Vitreous (Glassy) 
Color
colorless, pale yellow 
Streak
white 
Class
Orthorhombic - Pyramidal 
Fracture
Brittle 
Hardness
6-7 
Collection
Barbara Cureton Collection

Calcite

#AH56075
Locality
Fish Island, Great Cut, Dolores Co., Colorado, United States 
Formula
CaCO3 
Availability
Sold
Size
9 x 6 x 5.5 cm - Sm Cabinet 
Tagged
carbonate  

A 3cm lustrous Calcite crystal tucked in a crevice filled with 1-3mm Calcite crystals.


Calcite

Formula
CaCO3 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Stalactitic, Massive 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
colorless, white, pink, yellow, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
View Calcite
On Dakota Matrix
Previously Sold Calcite
On Dakota Matrix
Other Available Calcite
WebMineral
View Calcite
Mindat
View Calcite

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