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Rare Mineral Species

Monday, 25 November 2024 06:00 PM

Introducing the "Rare Mineral Species" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including arthurite, boulangerite, childrenite, cuprostibite, and vysotskite and more from places like Hingston Down quarry, Gunnislake, Cornwall, England, Vojtěch mine, Příbram, Central Bohemia, Czech Republic, Crinnis mine, Carlyon Bay, Cornwall, England, Vialas, Florac, Lozère, Occitanie, France, and Minneapolis adit, J-M Reef, Stillwater Co., Montana, United States.

Arthurite

#BN64925

$30.00 - Available
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Locality: Hingston Down quarry, Gunnislake, Cornwall, England
Formula: CuFe³⁺₂(AsO₄)₂(OH)₂·4H₂O
Availability: Available
Price: $30.00
Size: 1.5 x 0.7 x 0.8 cm - Thumbnail
Tagged: arsenate , copper
Special Info: Type Locality

Small but excellent specimen from the type locality.

Arthurite

Formula: CuFe³⁺₂(AsO₄)₂(OH)₂·4H₂O
Crystal System: Monoclinic
Crystal Habit: Prismatic, Acicular, Spherical
Cleavage: None, None, None
Luster: Vitreous (Glassy)
Color: apple green, emerald green
Streak: light green
Class: Monoclinic - Prismatic
Fracture: Brittle
Hardness: 3-4

Collection: Dr. Buford Nichols Collection
Special Info: Type Locality

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

Boulangerite

with Calcite - #JD64843

$75.00 - Available
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Locality: Vojtěch mine, Příbram, Central Bohemia, Czech Republic
Formula: Pb₅Sb₄S₁₁
Availability: Available
Price: $75.00
Size: 6 x 5.5 x 4 cm - Sm Cabinet
Tagged: sulfide

Wire-like or filliform steel gray Boulangerite throughout mass with Calcite..

Boulangerite

Formula: Pb₅Sb₄S₁₁
Crystal System: Orthorhombic
Crystal Habit: Acicular, Massive - Fibrous, Plumose
Cleavage: Indistinct, Indistinct, None
Luster: Metallic
Color: lead gray, blue gray, gray
Streak: reddish brown
Class: Orthorhombic
Fracture: Brittle
Hardness: 2.5

Collection: John Dagenais Collection

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

Childrenite

#BN64933

$35.00 - Available
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Locality: Crinnis mine, Carlyon Bay, Cornwall, England
Formula: Fe²⁺AlPO₄(OH)₂·H₂O
Availability: Available
Price: $35.00
Size: 4 x 2.5 x 2 cm - Miniature
Tagged: phosphate

Colorless cone-shaped crystals to 1mm in fine-grained slate.

Childrenite

Formula: Fe²⁺AlPO₄(OH)₂·H₂O
Crystal System: Orthorhombic
Crystal Habit: Prismatic, Tabular, Platy
Cleavage: Imperfect, None, None
Luster: Vitreous - Resinous
Color: white, yellowish brown, brownish black
Streak: white
Class: Orthorhombic - Pyramidal
Fracture: Conchoidal - Uneven
Hardness: 4.5-5

Collection: Dr. Buford Nichols Collection

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

Cuprostibite

#BAC64941

$125.00 - Available
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Locality: Vialas, Florac, Lozère, Occitanie, France
Formula: Cu₂Sb
Availability: Available
Price: $125.00
Size: 3.5 x 2 x 0.9 cm - Miniature
Tagged: copper

Weird interesting square tabular crystals with beveled edges.

Cuprostibite

Formula: Cu₂Sb
Crystal System: Tetragonal
Crystal Habit: Aggregates
Cleavage: Indistinct, None, None
Luster: Metallic
Color: steel gray
Class: Tetragonal - Ditetragonal Dipyramidal
Fracture: Uneven
Hardness: 4

Collection: William & Anne Cook Collection

On Dakota Matrix: Previously Sold Cuprostibite
On Dakota Matrix: Other Available Cuprostibite
WebMineral: View Cuprostibite
Mindat: View Cuprostibite

Vysotskite

#BAC64976

$225.00 - Available
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Locality: Minneapolis adit, J-M Reef, Stillwater Co., Montana, United States
Formula: (Pd,Ni)S
Availability: Available
Price: $225.00
Size: 1 x 0.6 x 0.4 cm - Thumbnail
Tagged: sulfide , nickel

This specimen has been microprobed and is cut and polished on both sides for identification. There is a white streak, which is the Vysotskite. The metallic goldish material is Chalcopyrite. Specimens are extremely rare, although there are many localities but scoping and analyses is very tedious.

Vysotskite

Formula: (Pd,Ni)S
Crystal System: Tetragonal
Crystal Habit: Irregular Grains
Cleavage: None, None, None
Luster: Metallic
Color: silver gray
Class: Tetragonal - Dipyramidal
Hardness: 1.5

Collection: William & Anne Cook Collection

On Dakota Matrix: Previously Sold Vysotskite
On Dakota Matrix: Other Available Vysotskite
WebMineral: View Vysotskite
Mindat: View Vysotskite

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