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Rare Minerals

Tuesday, 22 October 2024 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including chalcopyrite, diaspore, proustite, and yanomamite and more from places like French Creek mines, Chester Co., Pennslyvania, United States, Neudorf, Harz, Germany, Chester Emery mines, Hampden Co., Massachusetts, United States, Jachymov, Erzgegirge, Bohemia, Czech Republic, and Mangabeira Tin deposit, Monte Alegre de Goiás, Goiás, Brazil.

SOLD

Chalcopyrite

#64557

Details
Data
Provenance
Resources

Locality: French Creek mines, Chester Co., Pennslyvania, United States
Formula: Cu¹⁺Fe³⁺S₂
Availability: Sold
Size: 5 x 2.5 x 2 cm - Miniature
Tagged: sulfide , copper
Special Info: Antique Specimen

Old-timer specimen from a classic locality. Hoppered crystals to 1.5cm. See prov. for label. Ex. A.E. Seamen museum specimen.

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

Collection: Ex. A.E. Seaman Museum
Special Info: Antique Specimen

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

Chalcopyrite

with Galena - #64559

$25.00 - Available
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Locality: Neudorf, Harz, Germany
Formula: Cu¹⁺Fe³⁺S₂
Availability: Available
Price: $25.00
Size: 7 x 4.5 x 3.3 cm - Sm Cabinet
Special Info: Antique Specimen

Tiny 1mm Chalcopyrite crystals with Galena. Good old label with it.

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

Collection: Ex. A.E. Seaman Museum
Special Info: Antique Specimen

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

Diaspore

#64595

$40.00 - Available
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Provenance
Resources

Locality: Chester Emery mines, Hampden Co., Massachusetts, United States
Formula: AlO(OH)
Availability: Available
Price: $40.00
Size: 16 x 5 x 3.5 cm - Cabinet

Lilac colored Diaspore crystals to 6mm. A large specimen.

Diaspore

Formula: AlO(OH)
Crystal System: Orthorhombic
Crystal Habit: Platy, Tabular, Disseminated
Cleavage: Perfect, Good, None
Luster: Vitreous - Pearly
Color: white, greenish gray, grayish brown, colorless, yellow
Streak: white
Class: Orthorhombic - Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 6.5-7

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

Proustite

#64532

$195.00 - Available
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Provenance
Resources

Locality: Jachymov, Erzgegirge, Bohemia, Czech Republic
Formula: Ag₃AsS₃
Availability: Available
Price: $195.00
Size: 10 x 8 x 4.5 cm - Cabinet
Tagged: sulfide , silver

Ruby red Proustite crystals to 6mm tucked in vug. The matrix looks to be native Arsenic. This is an antique specimen from the A. E. Seamen museum. See prov. tab for label.