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Rare Minerals

Friday, 07 March 2025 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including bornite, bournonite, chalcopyrite, copper, and gerhardtite and more from places like Carn Brea, Redruth, Cornwall, England, Georg Mine, Willroth, Altenkirchen-Flammersfeld, Altenkirchen, Rhineland-Palatinate, Germany, Herodsfoot mine, Liskeard, Cornwall, England, Cole Shaft, Bisbee, Cochise Co., Arizona, United States, Rudabánya, Hungary, and Likasi mine, Katanga, Democratic Republic of Congo.

Bornite

#65517

$495.00 - Available
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Locality: Carn Brea, Redruth, Cornwall, England
Formula: Cu₅FeS₄
Availability: Available
Price: $495.00
Size: 6 x 4.5 x 4 cm - Sm Cabinet
Tagged: sulfide , copper

Iridescent blue Bornite crystals from important Cornish mine.

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: 3

Mineralpedia: View Bornite
On Dakota Matrix: Previously Sold Bornite
On Dakota Matrix: Other Available Bornite
WebMineral: View Bornite
Mindat: View Bornite

Bournonite

#65491

$950.00 - Available
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Locality: Georg Mine, Willroth, Altenkirchen-Flammersfeld, Altenkirchen, Rhineland-Palatinate, Germany
Formula: CuPbSbS₃
Availability: Available
Price: $950.00
Size: 8 x 5.5 x 5 cm - Sm Cabinet
Tagged: sulfide , copper

Old-time specimen of Bournonite from the famous . The face is covered by excellent crystals to 6mm.

Bournonite

Formula: CuPbSbS₃
Crystal System: Orthorhombic
Crystal Habit: Platy, Pseudo Cubic, Cog-wheel
Cleavage: Imperfect, None, None
Luster: Metallic
Color: gray, black, steel gray
Streak: gray
Class: Orthorhombic - Dipyramidal
Fracture: Sub Conchoidal
Hardness: 3

Mineralpedia: View Bournonite
On Dakota Matrix: Previously Sold Bournonite
On Dakota Matrix: Other Available Bournonite
WebMineral: View Bournonite
Mindat: View Bournonite

Chalcopyrite

on Tetrahedrite - #65516

$650.00 - Available
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Locality: Herodsfoot mine, Liskeard, Cornwall, England
Formula: Cu¹⁺Fe³⁺S₂
Availability: Available
Price: $650.00
Size: 8 x 4.5 x 5 cm - Sm Cabinet
Tagged: sulfide , copper

This is an old-timer specimen highly sought after locality, which has produced such nice specimens as this one. Chalcopyrite has coated or overgrown Tetrahedrite crystals which measure up to 7mm.

Chalcopyrite

Formula: Cu¹⁺Fe³⁺S₂
Crystal System: Tetragonal
Crystal Habit: Euhedral Crystals, Striated, Druse
Cleavage: Indistinct, None, None
Luster: Metallic
Color: brass yellow, honey yellow
Streak: greenish black
Class: Tetragonal - Scalenohedral
Fracture: Brittle
Hardness: 3.5

Mineralpedia: View Chalcopyrite
On Dakota Matrix: Previously Sold Chalcopyrite
On Dakota Matrix: Other Available Chalcopyrite
WebMineral: View Chalcopyrite
Mindat: View Chalcopyrite

Copper

#65515

$750.00 - Available
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Locality: Cole Shaft, Bisbee, Cochise Co., Arizona, United States
Formula: Cu
Availability: Available
Price: $750.00
Size: 5 x 4 x 3.5 cm - Miniature
Tagged: native element

Arborescent Copper crystals, some with possible Silver crystals perched nicely on Calcite with included Copper. This is substantial specimen from Bisbee, Arizona. It is most likely an old-timer mined many decades ago.