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Mixed Minerals

Sunday, 09 May 2021 05:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including anglesite, arsentsumebite, azurite, baryte, beyerite, and columbite-(fe) and more from places like Broken Hill, New South Wales, Australia, Tsumeb mine, Tsumeb, Namibia, Morenci mine, Greenlee Co., Arizona, United States, Silberbach mine, Stolberg, Harz, Saxony-Anhalt, Germany, Copperopolis, Yavapai Co., Arizona, and Etta mine, Pennington Co., South Dakota, United States.

Anglesite

#BC52642
Locality
Broken Hill, New South Wales, Australia 
Formula
PbSO4 
Availability
Available
Price
$425.00
Size
7.5 x 5 x 5.5 cm - Sm Cabinet 

Nice cluster of white and lustrous Anglesite crystals up to 1.5cm. These pieces are hardly ever seen on the market from this classic and large deposit.


Anglesite

Formula
PbSO4 
Crystal System
Orthorhombic 
Crystal Habit
Granular, Stalactitic 
Cleavage
Good, Distinct, None 
Luster
Adamantine 
Color
blue, colorless, green, gray, yellow 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
2.5-3 
Collection
Barbara Cureton Collection
Mineralpedia
View Anglesite
On Dakota Matrix
Previously Sold Anglesite
On Dakota Matrix
Other Available Anglesite
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Mindat
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Arsentsumebite

with Malachite - #55712
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
Pb2Cu(AsO4)(SO4)(OH) 
Availability
Sold
Size
8.5 x 5.5 x 2.5 cm - Sm Cabinet 
Tagged
arsenate , copper  

Lime green spongy masses of Arsentsumebite in a core of Malachite. Interesting crystals of nice micro blades of Malachite has overgrown the Arsentsumebite in parts.


Arsentsumebite

Formula
Pb2Cu(AsO4)(SO4)(OH) 
Crystal System
Monoclinic 
Cleavage
None, None, None 
Luster
Adamantine - Metallic 
Color
yellow green, emerald green 
Streak
light green 
Class
Monoclinic - Prismatic 
Hardness
4-5 

Azurite

#BC52626
Locality
Morenci mine, Greenlee Co., Arizona, United States 
Formula
Cu3(CO3)2(OH)2 
Availability
Available
Price
$395.00
Size
13 x 10 x 6.5 cm - Cabinet 
Tagged
carbonate , copper  

A large specimen of dull blue Azurite perhapd pseudomorphing Calcite(?). 


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 
Mineralpedia
View Azurite
On Dakota Matrix
Previously Sold Azurite
On Dakota Matrix
Other Available Azurite
WebMineral
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Mindat
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Baryte

#BC52636
Locality
Silberbach mine, Stolberg, Harz, Saxony-Anhalt, Germany 
Formula
BaSO4 
Availability
Available
Price
$295.00
Size
12 x 10 x 6 cm - Cabinet 

A large, beautiful cluster of lustrous white Baryte crystals. The crystals have an interesting sawtooth-like terminations which are actually staked plates. It is in great shape with no damage. There are three old lables, two of which are handwritten in ink. It is also Ex Earl L. Calvert collection. Please see prov. tab for labels.


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 
Collection
Barbara Cureton Collection
Mineralpedia
View Baryte
On Dakota Matrix
Previously Sold Baryte
On Dakota Matrix
Other Available Baryte
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Mindat
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Beyerite

with Bismite - #55717
Locality
Copperopolis, Yavapai Co., Arizona 
Formula
CaBi2O2(CO3)2 
Availability
Sold
Size
4 x 3 x 3 cm - Miniature 
Tagged
carbonate  

Massive specimen with areas of white Beyerite, sometimes with a pearly luster. Much of the specimen is green Bismite. 


Beyerite

Formula
CaBi2O2(CO3)2 
Crystal System
Orthorhombic 
Cleavage
None, None, None 
Luster
Vitreous - Dull 
Color
gray, gray green, yellow, yellowish white, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
2-3 
Collection
Dr. Buford Nichols Collection
On Dakota Matrix
Previously Sold Beyerite
On Dakota Matrix
Other Available Beyerite
WebMineral
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Mindat
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Columbite-(Fe)

#55736
Locality
Etta mine, Pennington Co., South Dakota, United States 
Formula
Fe2+Nb2O6 
Availability
Sold
Size
4 x 3.5 x 2 cm - Miniature 

Thick tabular crystal with striated faces. There are full faces on the two broad sides.


Columbite-(Fe)

Formula
Fe2+Nb2O6 
Crystal System
Orthorhombic 
Crystal Habit
Massive - Granular, Striated 
Cleavage
Distinct, None, None 
Luster
Sub Metallic 
Color
black, brownish black 
Streak
blackish brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness

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