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Ore Minerals

Thursday, 02 June 2022 08:00 AM

Introducing the "Ore Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including covellite, cylindrite, enargite, franckeite, galena, and hedenbergite and more from places like Summitville dist., Rio Grande Co., Colorado, United States, Poopo dist., Oruro dept., Bolivia, Leonard mine, Butte dist., Silver Bow Co., Montana, United States, San José mine, Oruro City, Oruro Dept., Bolivia, Blanchard mine, Socorro Co., New Mexico, United States, and Silver Star, Madison Co., Montana, United States.

Covellite

- copper ore - #AH58555
Locality
Summitville dist., Rio Grande Co., Colorado, United States 
Formula
CuS 
Availability
Sold
Size
7 x 4.5 x 3.5 cm - Sm Cabinet 
Tagged
sulfide , copper , ore specimen  

Flakes and crystal grains of ourpole Covellite throughout specimen.


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
View Covellite
On Dakota Matrix
Previously Sold Covellite
On Dakota Matrix
Other Available Covellite
WebMineral
View Covellite
Mindat
View Covellite

Cylindrite

- tin ore - #40939
Locality
Poopo dist., Oruro dept., Bolivia 
Formula
FePb3Sn4Sb2S14 
Availability
Sold
Size
8 x 5 x 3 cm - Sm Cabinet 
Tagged
sulfide , ore specimen , tin  

Fantastic tube-like crystals of Cylindrite, a rare tin sulfide. Excellent specimen.


Cylindrite

Formula
FePb3Sn4Sb2S14 
Crystal System
Triclinic 
Crystal Habit
Cylindrical, Radial 
Cleavage
None, None, None 
Luster
Metallic 
Color
lead gray, grayish black 
Streak
black 
Class
Triclinic - Pinacoidal 
Fracture
Malleable 
Hardness
2.5 

Enargite

with Pyrite - copper ore - #41352
Locality
Leonard mine, Butte dist., Silver Bow Co., Montana, United States 
Formula
Cu3AsS4 
Availability
Sold
Size
8 x 5 x 3 cm - Sm Cabinet 
Tagged
sulfide , copper , ore specimen  

Dozens of 3-4mm textbook crystals of Enargite with Pyrite.


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
Mineralpedia
View Enargite
On Dakota Matrix
Previously Sold Enargite
On Dakota Matrix
Other Available Enargite
WebMineral
View Enargite
Mindat
View Enargite

Franckeite

- tin, lead ore - #49700
Locality
San José mine, Oruro City, Oruro Dept., Bolivia 
Formula
Fe2+(Pb,Sn2+)6Sn4+2Sb3+2S14 
Availability
Sold
Size
8 x 6 x 3 cm - Sm Cabinet 
Tagged
sulfide , ore specimen , tin  

Franckeite is a rather rare mineral and an ore of tin. It has also quite the interesting mineral crystal habit. As seen in the photos, it forms interesting curls and round tubes. This locality is one of the best from Bolivia, all the other localities elsewhere in the world are inferior.


Franckeite

Formula
Fe2+(Pb,Sn2+)6Sn4+2Sb3+2S14 
Crystal System
Triclinic 
Crystal Habit
Tabular, Massive - Fibrous, Radial 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
grayish black, blackish gray 
Streak
grayish black 
Class
Triclinic - Pinacoidal 
Fracture
Flexible 
Hardness
2.5 

Galena

with Fluorite & Baryte - lead ore - #58571
Locality
Blanchard mine, Socorro Co., New Mexico, United States 
Formula
PbS 
Availability
Sold
Size
14 x 8 x 5 cm - Cabinet 
Tagged
ore mineral  

A good specimen full of grey Galena cubes to 1.9cm coated with Anglesite. Associated are Fluorite and Baryte. 


Galena

Formula
PbS 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Massive - Granular, Massive 
Cleavage
Perfect, Perfect, Perfect 
Luster
Metallic 
Color
light lead gray, dark lead gray 
Streak
grayish black 
Class
Isometric - Hexoctahedral 
Fracture
Brittle 
Hardness
2.5 
Collection
Jungles Collection
Mineralpedia
View Galena
On Dakota Matrix
Previously Sold Galena
On Dakota Matrix
Other Available Galena
WebMineral
View Galena
Mindat
View Galena

Hedenbergite

- gold ore - #49107
Locality
Silver Star, Madison Co., Montana, United States 
Formula
CaFe2+Si2O6 
Availability
Sold
Size
15 x 11 x 11 cm - Cabinet 
Tagged
ore specimen  

The Silver Star was a gold mine in Madison county, which was the second largest gold district in Montana. The deposit was located at the far south end of the Boulder Batholith. Apparently, at least, some of the gold ore was hosted in Hedenbergite. This specimen, was collected by the late Chris van Laer.  This Hedenbergite contains divergent bladed crystals to 8cm. Excellent specimen of good gold ore. 


Hedenbergite

Formula
CaFe2+Si2O6 
Crystal System
Monoclinic 
Crystal Habit
Granular, Crystalline - Fine, Lamellar 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous - Pearly 
Color
brownish green, gray green, grayish black, dark green, black 
Streak
white green 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
5-6 
Collection
Chris van Laer Collection

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