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Hampson Colorado Minerals

Sunday, 31 May 2020 06:00 PM

Introducing the "Hampson Colorado Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including copper, covellite, enargite and more from places like Cashin mine, Montrose Co., Colorado, United States, Golconda vein, Summitville dist., Rio Grande Co., Colorado, United States, Longfellow mine, Red Mountain, San Juan Co., Colorado, United States, and National Belle mine, Red Mountain, Ouray Co., Colorado, United States.

Copper

with Silver - #AH53363
Locality
Cashin mine, Montrose Co., Colorado, United States 
Formula
Cu 
Availability
Sold
Size
10 x 8.5 x 4 cm - Cabinet 
Tagged
native element  

Crude Copper crystals to 1.5cm with an overgrowth of Silver, which is tarnished deeply to a dull black color.


Copper

Formula
Cu 
Crystal System
Isometric 
Crystal Habit
Nodular, Arborescent 
Cleavage
None, None, None 
Luster
Metallic 
Color
brown, copper red, light pink, red 
Streak
rose 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Collection
Arnold G Hampson Collection
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Copper

#AH53381
Locality
Cashin mine, Montrose Co., Colorado, United States 
Formula
Cu 
Availability
Sold
Size
13 x 5.5 x 5.5 cm - Cabinet 
Tagged
native element  

Native Copper deeply tarnished in gangue of Kaoline and siltstone. Masses of Copper up to 500 pounds are recorded from the Cashin mine. The Cashin mine was discovered in 1896 and is located in the La Sal mining district of Paradox Valley close to La Sal creek.


Copper

Formula
Cu 
Crystal System
Isometric 
Crystal Habit
Nodular, Arborescent 
Cleavage
None, None, None 
Luster
Metallic 
Color
brown, copper red, light pink, red 
Streak
rose 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Collection
Arnold G Hampson Collection
Mineralpedia
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Previously Sold Copper
On Dakota Matrix
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Covellite

#AH53378
Locality
Golconda vein, Summitville dist., Rio Grande Co., Colorado, United States 
Formula
CuS 
Availability
Sold
Size
4.5 x 4 x 2.5 cm - Miniature 
Tagged
sulfide , copper  

The specimen dates back to 1968, when it was obtained by Hampson. The specimen contains nothing but Covellite in 2cm thin plates in no particular orientation.

Covellite occurs in the zone of secondary enrichment. It is actually rare in most Colorado districts. At Summitville, it is the most abundant secondary copper minerals. Reports show that solid masses up to 6 inches thick were found in the Golconda vein.


Covellite

Formula
CuS 
Crystal System
Hexagonal 
Crystal Habit
Platy, Foliated 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
indigo blue, light blue, dark blue, black 
Streak
black gray 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle 
Hardness
1.5-2 
Collection
Arnold G Hampson Collection
Mineralpedia
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Enargite

#AH53388
Locality
Longfellow mine, Red Mountain, San Juan Co., Colorado, United States 
Formula
Cu3AsS4 
Availability
Sold
Size
9 x 5 x 3 cm - Sm Cabinet 
Tagged
sulfide , copper  

The reflectivity and lustrous prevents good photos (as you can see), the crystals are to 4mm and well-formed down the center of the specimen. 


Enargite

Formula
Cu3AsS4 
Crystal System
Orthorhombic 
Crystal Habit
Euhedral Crystals, Massive - Granular, Prismatic 
Cleavage
Perfect, Distinct, Distinct 
Luster
Metallic 
Color
steel gray, blackish gray, violet black 
Streak
black 
Class
Orthorhombic - Pyramidal 
Fracture
Uneven 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
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Enargite

#AH53390
Locality
Longfellow mine, Red Mountain, San Juan Co., Colorado, United States 
Formula
Cu3AsS4 
Availability
Sold
Size
5 x 4.5 x 1.5 cm - Miniature 
Tagged
sulfide , copper  

Distinct and well-formed Enargite crystals straited parallel to the prism axis. The crystals show good metallic luster. The Enargite crystals reach 4mm and most occur with the pocket at the center of the specimen. 


Enargite

Formula
Cu3AsS4 
Crystal System
Orthorhombic 
Crystal Habit
Euhedral Crystals, Massive - Granular, Prismatic 
Cleavage
Perfect, Distinct, Distinct 
Luster
Metallic 
Color
steel gray, blackish gray, violet black 
Streak
black 
Class
Orthorhombic - Pyramidal 
Fracture
Uneven 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
View Enargite
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Previously Sold Enargite
On Dakota Matrix
Other Available Enargite
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Mindat
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Enargite

#AH53392
Locality
National Belle mine, Red Mountain, Ouray Co., Colorado, United States 
Formula
Cu3AsS4 
Availability
Sold
Size
8 x 6.5 x 4 cm - Sm Cabinet 
Tagged
sulfide , copper  

A good representative specimen from this mice, which has produced larger and better crystals. These crystals are good, just small on the order of less than 0.75mm in a 20 x 8mm area.


Enargite

Formula
Cu3AsS4 
Crystal System
Orthorhombic 
Crystal Habit
Euhedral Crystals, Massive - Granular, Prismatic 
Cleavage
Perfect, Distinct, Distinct 
Luster
Metallic 
Color
steel gray, blackish gray, violet black 
Streak
black 
Class
Orthorhombic - Pyramidal 
Fracture
Uneven 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
View Enargite
On Dakota Matrix
Previously Sold Enargite
On Dakota Matrix
Other Available Enargite
WebMineral
View Enargite
Mindat
View Enargite

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