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Rare Earth Minerals

Tuesday, 19 April 2022 02:30 PM

Introducing the "Rare Earth Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including bastnasite-(ce), burbankite, cerite-(ce), cerite-(la) , cheralite, and chevkinite-(ce) and more from places like Mountain Pass mine, San Bernardino Co., California, United States, Big Sandy Creek, Bearpaw Mts., Hill Co., Montana, United States, Bastnäs mines, Riddarhyttan, Västmanland, Sweden, Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia, Platt Pegmatite mine, Big Creek peg. dist, Carbon County, Wyoming, United States, and Mount Tom road cut, Exeter, Washington Co., Rhode Island, United States.

SOLD

Bastnasite-(Ce)

#58200

Details
Data
Provenance
Resources

Locality: Mountain Pass mine, San Bernardino Co., California, United States
Formula: CeCO₃F
Availability: Sold
Size: 8 x 8 x 8 cm - Sm Cabinet
Tagged: carbonate , REE mineral

155 grams of Bastnasite from the Mountain Pass mine.

Bastnasite-(Ce)

Formula: CeCO₃F
Crystal System: Hexagonal
Crystal Habit: Prismatic, Massive - Granular
Cleavage: Imperfect, Indistinct, None
Luster: Vitreous - Greasy
Color: yellow, reddish brown
Streak: white
Class: Hexagonal - Ditrigonal Dipyramidal
Fracture: Uneven
Hardness: 4-5

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

SOLD

Burbankite

#BW58050

Details
Data
Provenance
Resources

Locality: Big Sandy Creek, Bearpaw Mts., Hill Co., Montana, United States
Formula: (Na,Ca)₃(Sr,Ba,Ce)₃(CO₃)₅
Availability: Sold
Size: 4 x 2.5 x 1.5 cm - Miniature
Tagged: carbonate , REE mineral
Special Info: Type Locality

Burbankite is a rare earth mineral from the Vermiculite Prospects at the head of Big Sandy Creek in southeastern Hill Co., Montana. The mineral deposits occur in mafic monzonite, syenite and "shonkinite", a dark-colored syenite composed chiefly of augite and alkali feldspar, and possibly containing olivine, hornblende, biotite, and nepheline.

The Burbankite on this specimen include tiny less than 1mm pale to honey colored hexagonal prisms. It's hard to tell, but there maybe some plates of Calkinsite in spongy creamy parts of the specimen. Ancylite may also be present. In association are Aegerine crystals, limonite after Pyrite, and Sanadine (white). Burbankite crystals up to 3cm were found at the mine.

Burbankite

Formula: (Na,Ca)₃(Sr,Ba,Ce)₃(CO₃)₅
Crystal System: Hexagonal
Cleavage: Distinct, None, None
Luster: Vitreous (Glassy)
Color: colorless, grayish yellow, orange, pink
Streak: white
Class: Hexagonal - Dihexagonal Dipyramidal
Hardness: 3.5

Collection: Bill Wilson Collection
Special Info: Type Locality

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

SOLD

Cerite-(Ce)

#BW58053

Details
Data
Provenance
Resources

Locality: Bastnäs mines, Riddarhyttan, Västmanland, Sweden
Formula: (Ce,La,Ca)₉(Mg,Fe³⁺)(SiO₄)₆(SiO₃OH)(OH)₃
Availability: Sold
Size: 8 x 5 x 3.5 cm - Sm Cabinet
Tagged: REE mineral
Special Info: Type Locality

A large blackish purple chunk of Cerite from the type locality.

Cerite-(Ce)

Formula: (Ce,La,Ca)₉(Mg,Fe³⁺)(SiO₄)₆(SiO₃OH)(OH)₃
Crystal System: Trigonal
Crystal Habit: Massive - Granular
Cleavage: None, None, None
Luster: Vitreous - Adamantine
Color: brown, clove brown, cherry red, gray
Class: Trigonal - Ditrigonal Pyramidal
Fracture: Uneven
Hardness: 5.5

Collection: Bill Wilson Collection
Special Info: Type Locality

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

SOLD

Cerite-(La)

with Ancylite-(Ce) - #BW58028

Details
Data
Provenance
Resources

Locality: Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia
Formula: (La,Ce,Ca)₉(Fe,Ca,Mg)(SiO₄)₃(SiO₃OH)₄(OH)₃
Availability: Sold
Size: 4 x 3.5 x 1.5 cm - Miniature
Tagged: REE mineral
Special Info: Type Locality

Cerite-(La) was renamed by the IMA in 2020 as Ferricerite. The Cerite occurs in a spongy mass as yellowish-tan granular crystals with reddish Ancylite. The white matrix is Natrolite.

Cerite-(La)

Formula: (La,Ce,Ca)₉(Fe,Ca,Mg)(SiO₄)₃(SiO₃OH)₄(OH)₃
Crystal System: Trigonal
Crystal Habit: Equant Grains, Rhombohedral Crystals
Cleavage: None, None, None
Luster: Vitreous (Glassy)
Color: light yellow, pinkish brown
Streak: white
Class: Trigonal - Ditrigonal Pyramidal
Fracture: Brittle - Conchoidal
Hardness: 5

Collection: Bill Wilson Collection
Special Info: Type Locality

On Dakota Matrix: Previously Sold Cerite-(La)
On Dakota Matrix: Other Available Cerite-(La)
WebMineral: View Cerite-(La)
Mindat: View Cerite-(La)

SOLD

Cheralite

with Euxenite - #BW58029

Details
Data
Provenance
Resources

Locality: Platt Pegmatite mine, Big Creek peg. dist, Carbon County, Wyoming, United States
Formula: CaTh(PO₄)₂
Availability: Sold
Size: 3.5 x 2.5 x 2 cm - Miniature
Tagged: phosphate
Special Info: Radioactive!!

Reddish brown mass with a bit of black Euxenite.

Cheralite

Collection: Bill Wilson Collection
Special Info: Radioactive!!

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

SOLD

Chevkinite-(Ce)

#BW58035

Details
Data
Provenance
Resources

Locality: Mount Tom road cut, Exeter, Washington Co., Rhode Island, United States
Formula: Ce₄(Ti,Fe²⁺,Fe³⁺)₅O₈(Si₂O₇)₂
Availability: Sold
Size: 4 x 3 x 3.5 cm - Miniature
Tagged: REE mineral

A black mass of Chevkinite from a obscure locality.

Chevkinite-(Ce)

Formula: Ce₄(Ti,Fe²⁺,Fe³⁺)₅O₈(Si₂O₇)₂
Crystal System: Monoclinic
Crystal Habit: Acicular, Massive, Metamict
Cleavage: None, None, None
Luster: Earthy (Dull)
Color: brownish black, dark red
Streak: black
Class: Monoclinic - Prismatic
Fracture: Brittle - Conchoidal
Hardness: 5-5.5

Collection: Bill Wilson Collection

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

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