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Rare Minerals Specimens

Sunday, 22 May 2022 02:00 PM

Introducing the "Rare Minerals Specimens" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including alstonite, berryite, braitschite-(ce), callaghanite, covellite, and fluocerite-(ce) and more from places like Minerva #1 mine, Hardin Co., Illinois, United States, Mike mine, San Juan Co., Colorado, United States, Cane Creek, San Juan Co., Utah, United States, Basic Refractories mine, Gabbs, Nye Co., Nevada, United States, Leonard mine, Butte dist., Silver Bow Co., Montana, United States, and Novo Horizonte, Bahia, Brazil.

SOLD

Alstonite

#BW58511

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Data
Provenance
Resources

Locality: Minerva #1 mine, Hardin Co., Illinois, United States
Formula: BaCa(CO₃)₂
Availability: Sold
Size: 4 x 3 x 2.5 cm - Miniature
Tagged: carbonate

White to colorless pyramidal Alstonite crystals to 1mm in vugs.

Alstonite

Formula: BaCa(CO₃)₂
Crystal System: Triclinic
Crystal Habit: Euhedral Crystals, Pseudo Hexagonal
Cleavage: Imperfect, None, None
Luster: Vitreous (Glassy)
Color: colorless, gray, white, pink
Streak: white
Class: Triclinic
Fracture: Uneven
Hardness: 4-4.5

Collection: Bill Wilson Collection

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

SOLD

Berryite

with Aikinite - #BW58097

Details
Data
Provenance
Resources

Locality: Mike mine, San Juan Co., Colorado, United States
Formula: Cu₃Ag₂Pb₃Bi₇S₁₆
Availability: Sold
Size: 4.5 x 4 x 3.5 cm - Miniature
Tagged: sulfide , copper , silver

Strands of acicular to filliform Berryite in 1-2mm vugs with iridescent, tarnished, long bladed and striated lengthwise Aikinite to 4mm. There are two good areas of Aikinite. Very good specimen.

Berryite

Formula: Cu₃Ag₂Pb₃Bi₇S₁₆
Crystal System: Monoclinic
Cleavage: Indistinct, None, None
Luster: Metallic
Color: blue gray, gray
Class: Monoclinic - Prismatic
Hardness: 3.5

Collection: Bill Wilson Collection

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

SOLD

Braitschite-(Ce)

#58502

Details
Data
Provenance
Resources

Locality: Cane Creek, San Juan Co., Utah, United States
Formula: (Ca,Na)₇Ce₂B₂₄O₂₈(O,OH)₁₂(OH)₁₂·H₂O
Availability: Sold
Size: 5 x 4.5 x 1.5 cm - Miniature
Tagged: REE mineral
Special Info: Type & Only Locality

A pink cluster of Braitschite-(Ce) to 2.5mm. Extremely rare.

Braitschite-(Ce)

Formula: (Ca,Na)₇Ce₂B₂₄O₂₈(O,OH)₁₂(OH)₁₂·H₂O
Crystal System: Hexagonal
Crystal Habit: Microscopic Crystals, Hexagonal, Platy
Luster: Vitreous (Glassy)
Color: colorless, white, pink
Streak: white
Class: Hexagonal
Hardness: -

Collection: Bill Wilson Collection
Special Info: Type & Only Locality

On Dakota Matrix: Previously Sold Braitschite-(Ce)
On Dakota Matrix: Other Available Braitschite-(Ce)
WebMineral: View Braitschite-(Ce)
Mindat: View Braitschite-(Ce)

Callaghanite

#58522

$45.00 - Available
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Provenance
Resources

Locality: Basic Refractories mine, Gabbs, Nye Co., Nevada, United States
Formula: Cu₂Mg₂CO₃(OH)₆·2H₂O
Availability: Available
Price: $45.00
Size: 3.5 x 3 x 2.5 cm - Miniature
Tagged: carbonate , copper
Special Info: Type Locality

Callaghanite was first found at this locality, thus the type locality. It is a 6 or 7 locality mineral, but is only a copper-magnesium carbonate. The mineral was formed at the contact of diorite with serpentinized dolostone. The color is much like Azurite, an azure-blue. The crystals on this specimen are aggregated so there is not any single good crystals, which are usually quite nice.

Callaghanite

Formula: Cu₂Mg₂CO₃(OH)₆·2H₂O
Crystal System: Monoclinic
Cleavage: Perfect, Perfect, None
Luster: Vitreous (Glassy)
Color: azure, violet blue
Streak: white
Class: Monoclinic - Prismatic
Fracture: Brittle - Uneven
Hardness: 3-3.5

Special Info: Type Locality

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

Covellite

#BW58510

$50.00 - Available
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Locality: Leonard mine, Butte dist., Silver Bow Co., Montana, United States
Formula: CuS
Availability: Available
Price: $50.00
Size: 3 x 3 x 2.5 cm - Thumbnail
Tagged: copper , sufide

Blue to purple platy Covellite.

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: Bill Wilson Collection

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

SOLD

Fluocerite-(Ce)

ps after Bastnesite - #58471

Details
Data
Provenance
Resources

Locality: Novo Horizonte, Bahia, Brazil
Formula: CeF₃
Availability: Sold
Size: 1.8 x 1.9 x 1.3 cm - Thumbnail
Tagged: REE mineral

Excellent replacement of Bastnasite by pink Fluorcerite. The largest crystal is about 1mm. The yellow needles are Rutile and the silvery plate is Hematite. Great specimen.

Fluocerite-(Ce)

Formula: CeF₃
Crystal System: Hexagonal
Crystal Habit: Massive, Prismatic
Cleavage: Perfect, None, None
Luster: Waxy
Color: pale wax yellow, yellowish brown, reddish brown
Streak: yellow white
Class: Hexagonal - Dihexagonal Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 4.5-5

Mineralpedia: View Fluocerite-(Ce)
On Dakota Matrix: Previously Sold Fluocerite-(Ce)
On Dakota Matrix: Other Available Fluocerite-(Ce)
WebMineral: View Fluocerite-(Ce)
Mindat: View Fluocerite-(Ce)

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