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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, gerhardtite, mountkeithite, schwartzembergite, and stromeyerite and more from places like Carn Brea, Redruth, Cornwall, England, Likasi mine, Katanga, Democratic Republic of Congo, MKD5 Ni deposit, Mt. Keith, Western Australia, Australia, San Francisco mine, Sierra Gorda dist., Antofagasta, Chile, and Alexander mine, Vrančice, Příbram, Bohemia, Czech Republic.

Bornite - 65517

Bornite - 65517

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

Gerhardtite - 65610

Gerhardtite - 65610

Gerhardtite

#65610

$45.00 - Available
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Locality: Likasi mine, Katanga, Democratic Republic of Congo
Formula: Cu₂NO₃(OH)₃
Availability: Available
Price: $45.00
Size: Capsule
Tagged: copper

Cobalt blue acicular crystals 3mm.

Gerhardtite

Formula: Cu₂NO₃(OH)₃
Crystal System: Orthorhombic
Cleavage: Perfect, Good, None
Luster: Vitreous (Glassy)
Color: green, dark green
Streak: light green
Class: Orthorhombic - Disphenoidal
Hardness: 2

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

Mountkeithite - 65465

Mountkeithite - 65465

Mountkeithite

#65465

$40.00 - Available
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Locality: MKD5 Ni deposit, Mt. Keith, Western Australia, Australia
Formula: Mg₁₁Fe³⁺₃(SO₄)_3.5(OH)₂₄·11H₂O
Availability: Available
Price: $40.00
Size: 1.2 x 0.6 x 0.4 cm - Thumbnail
Special Info: Type Locality

Purple grains in serpentine matrix to 1mm.

Mountkeithite

Formula: Mg₁₁Fe³⁺₃(SO₄)_3.5(OH)₂₄·11H₂O
Crystal System: Hexagonal
Crystal Habit: Flakes, Granular, Rosette
Cleavage: Perfect, None, None
Luster: Pearly
Color: white, light pink
Streak: white
Class: Hexagonal
Hardness: 2

Special Info: Type Locality

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

Schwartzembergite - 65652

Schwartzembergite - 65652

Schwartzembergite

#65652

$55.00 - Available
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Locality: San Francisco mine, Sierra Gorda dist., Antofagasta, Chile
Formula: Pb²⁺₅H₂I³⁺O₆Cl₃
Availability: Available
Price: $55.00
Size: 2.3 x 1.6 x 1.6 cm - Thumbnail

Yellow platey crystals to 1mm.

Schwartzembergite

Formula: Pb²⁺₅H₂I³⁺O₆Cl₃
Crystal System: Tetragonal
Crystal Habit: Druse, Crystalline - Fine
Cleavage: Distinct, None, None
Luster: Adamantine
Color: yellow brown, light yellow, reddish brown
Streak: light yellow
Class: Tetragonal - Ditetragonal Dipyramidal
Hardness: 2.5

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

Stromeyerite - 65538

Stromeyerite - 65538

Stromeyerite

#65538

$350.00 - Available
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Locality: Alexander mine, Vrančice, Příbram, Bohemia, Czech Republic
Formula: CuAgS
Availability: Available
Price: $350.00
Size: 6.5 x 4 x 1.5 cm - Sm Cabinet
Tagged: sulfide , copper , silver

Crude dull grey crystals and masses of rare Stromeyerite.

Stromeyerite

Formula: CuAgS
Crystal System: Orthorhombic
Crystal Habit: Granular, Massive, Pseudo Hexagonal
Cleavage: None, None, None
Luster: Metallic
Color: blue gray, dark blue, dark steel gray, steel gray
Streak: steel gray
Class: Orthorhombic - Dipyramidal
Fracture: Conchoidal
Hardness: 2.5-3

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

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