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Mixed Minerals

Friday, 30 August 2019 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including bornite, brochantite, cerussite, chalcocite, and chrysocolla and more from places like Prokop mine, Příbram, Bohemia, Czech Republic, Metcalf mine, Greenlee Co., Arizona, United States, Tsumeb mine, Tsumeb, Namibia, Cole Shaft, Bisbee, Cochise Co., Arizona, United States, San Miguel mine, Sandoval Co., New Mexico, United States, and Chuquicamata mine, El Loa Prov., Antofagasta, Chile.

Bornite

#RW51201
Locality
Prokop mine, Příbram, Bohemia, Czech Republic 
Formula
Cu5FeS4 
Availability
Sold
Size
10 x 7 x 5.5 cm - Cabinet 
Tagged
sulfide , copper , ore specimen  

Massive blue iridescent Bornite brecciated ore specimen. 


Bornite

Formula
Cu5FeS4 
Crystal System
Orthorhombic 
Crystal Habit
Massive - Granular, Reniform, Granular 
Cleavage
Imperfect, None, None 
Luster
Metallic 
Color
copper red, bronze brown, purple 
Streak
grayish black 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
Collection
Robert J. Waidler Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Bornite
On Dakota Matrix
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Brochantite

#RW51179
Locality
Metcalf mine, Greenlee Co., Arizona, United States 
Formula
Cu4SO4(OH)6 
Availability
Available
Price
$175.00
Size
9 x 4.5 x 2.5 cm - Sm Cabinet 
Tagged
copper  

Exceptional emerald green prismatic and large Brochantite prismatic crystals to 2.5mm. These crystals are truly amazing, well-defined and large for the species.


Brochantite

Formula
Cu4SO4(OH)6 
Crystal System
Monoclinic 
Crystal Habit
Acicular, Prismatic, Druse 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
green, emerald green, black 
Streak
pale green 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Robert J. Waidler Collection

Cerussite

#RW51200
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
PbCO3 
Availability
Available
Price
$95.00
Size
8 x 6 x 3.5 cm - Sm Cabinet 
Tagged
carbonate  

Large specimen of lustrous white Cerussite showing large distinct crystals and most show twinning planes. There is a small spot on the backside which shows a green inclusion, most like Duftite. It did not take photos well, but in-hand this specimen is ver impressive.


Cerussite

Formula
PbCO3 
Crystal System
Orthorhombic 
Crystal Habit
Reticulate, Massive - Granular, Crystalline - Coarse 
Cleavage
Distinct, Distinct, None 
Luster
Adamantine 
Color
colorless, white, gray, blue, green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3-3.5 
Collection
Robert J. Waidler Collection
Mineralpedia
View Cerussite
On Dakota Matrix
Previously Sold Cerussite
On Dakota Matrix
Other Available Cerussite
WebMineral
View Cerussite
Mindat
View Cerussite

Chalcocite

with Chalcopyrite - #RW51153
Locality
Cole Shaft, Bisbee, Cochise Co., Arizona, United States 
Formula
Cu2
Availability
Sold
Size
12 x 7 x 2.5 cm - Cabinet 
Tagged
sulfide , copper , ore specimen  

Large cabinet specimen loaded with well-formed twinned Chalcocite crystals to 2.5mm with Chalcopyrite and Pyrite. The backside is sawed flat.


Chalcocite

Formula
Cu2
Crystal System
Monoclinic 
Crystal Habit
Massive, Granular, Euhedral Crystals 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
blue black, gray, black, black gray, steel gray 
Streak
grayish black 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
2.5-3 
Collection
Robert J. Waidler Collection

Chalcocite

replacing wood - #RW51154
Locality
San Miguel mine, Sandoval Co., New Mexico, United States 
Formula
Cu2
Availability
Sold
Size
9 x 5 x 4 cm - Sm Cabinet 
Tagged
sulfide , copper  

Dull black Chalcocite replacing wood with streaks of Malachite.


Chalcocite

Formula
Cu2
Crystal System
Monoclinic 
Crystal Habit
Massive, Granular, Euhedral Crystals 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
blue black, gray, black, black gray, steel gray 
Streak
grayish black 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
2.5-3 
Collection
Robert J. Waidler Collection

Chrysocolla

#BN51199
Locality
Chuquicamata mine, El Loa Prov., Antofagasta, Chile 
Formula
(Cu,Al)2H2Si2O5(OH)4·nH2
Availability
Sold
Size
8.5 x 4 x 4.5 cm - Sm Cabinet 

Green to blue, light weight mass of colorful and banded Chrysocolla.


Chrysocolla

Formula
(Cu,Al)2H2Si2O5(OH)4·nH2
Crystal System
Orthorhombic 
Crystal Habit
Botryoidal, Earthy, Stalactitic 
Cleavage
None, None, None 
Luster
Vitreous - Dull 
Color
green, bluish green, blue, blackish blue, brown 
Streak
light green 
Class
Orthorhombic 
Fracture
Brittle - Sectile 
Hardness
2.5-3.5 
Collection
Dr. Buford Nichols Collection

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