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Rare Earth Minerals

Thursday, 31 August 2023 12:30 PM

Rare Earth Minerals are those minerals which contain a rare earth element such as yttrium, lanthanum, cerium etc. There are 17 REE's all together and each are used in high tech applications such as computers, cell phones, and televisions to name just a few.

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Aeschynite-(Ce) - BAC62393

Aeschynite-(Ce) - BAC62393

Aeschynite-(Ce)

#BAC62393

Details
Data
Provenance
Resources

Locality: Ilmen Mountains, Chelyabinsk, Southern Urals, Russia
Formula: (Ce,Ca,Fe,Th)(Ti,Nb)₂(O,OH)₆
Availability: Sold
Size: 3.5 x 3 x 3 cm - Miniature
Tagged: REE mineral

Dark brown to dark green anhedral grains to 4mm.

Aeschynite-(Ce)

Formula: (Ce,Ca,Fe,Th)(Ti,Nb)₂(O,OH)₆
Crystal System: Orthorhombic
Crystal Habit: Massive, Acicular
Cleavage: None, None, None
Luster: Adamantine - Resinous
Color: brown, brownish black, yellow, black
Streak: brownish black
Class: Orthorhombic - Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 5-6

Collection: William & Anne Cook Collection

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

Agardite-(Ce) - BAC62377

Agardite-(Ce) - BAC62377

Agardite-(Ce)

#BAC62377

$35.00 - Available
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Data
Provenance
Resources

Locality: Laurium, Attika, Greece
Formula: Cu²⁺₆Ce(AsO₄)₃(OH)₆·3H₂O
Availability: Available
Price: $35.00
Size: 3 x 3 x 2 cm - Thumbnail
Tagged: arsenate , copper , REE mineral

Light green "fuzzy" crystals with Azurite.

Agardite-(Ce)

Formula: Cu²⁺₆Ce(AsO₄)₃(OH)₆·3H₂O
Crystal System: Hexagonal
Crystal Habit: Acicular
Cleavage: None, None, None
Luster: Vitreous (Glassy)
Color: yellow green
Streak: greenish white
Class: Hexagonal - Dipyramidal
Fracture: Conchoidal
Hardness: 3

Collection: William & Anne Cook Collection

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

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Agardite-(Nd) - BAC62355

Agardite-(Nd) - BAC62355

Agardite-(Nd)

#BAC62355

Details
Data
Provenance
Resources

Locality: Big 3 mine, Esmeralda Co., Nevada, United States
Formula: Cu²⁺₆Nd(AsO₄)₃(OH)₆·3H₂O
Availability: Sold
Size: 4 x 2 x 1 cm - Miniature
Tagged: arsenate , copper , REE mineral

Sprays of bluish Agardite-(Nd) to about 1mm.

Agardite-(Nd)

Formula: Cu²⁺₆Nd(AsO₄)₃(OH)₆·3H₂O
Crystal System: Hexagonal
Crystal Habit: Radial, Prismatic, Aggregates
Luster: Vitreous (Glassy)
Color: grass green, sky blue
Streak: greenish white
Class: Hexagonal - Dipyramidal
Hardness: 3-4

Collection: William & Anne Cook Collection

Mineralpedia: View Agardite-(Nd)
On Dakota Matrix: Previously Sold Agardite-(Nd)
On Dakota Matrix: Other Available Agardite-(Nd)
WebMineral: View Agardite-(Nd)
Mindat: View Agardite-(Nd)

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Allanite-(La) - BAC62388

Allanite-(La) - BAC62388

Allanite-(La)

#BAC62388

Details
Data
Provenance
Resources

Locality: Jarnot prospect, Middlebury, Connecticut, United States
Formula: CaLaFe²⁺Al₂(Si₂O₇)(SiO₄)O(OH)
Availability: Sold
Size: 2.5 x 2.4 x 1.4 cm - Thumbnail
Tagged: REE mineral

Glassy red, vitreous metamict mass.

Allanite-(La)

Formula: CaLaFe²⁺Al₂(Si₂O₇)(SiO₄)O(OH)
Crystal System: Monoclinic
Crystal Habit: Prismatic
Cleavage: Imperfect, None
Luster: Vitreous (Glassy)
Color: brown, black
Streak: grayish brown
Class: Monoclinic - Prismatic
Fracture: Brittle - Conchoidal
Hardness: 6

Collection: William & Anne Cook Collection

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

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Allanite-(Nd) - BAC62380

Allanite-(Nd) - BAC62380

Allanite-(Nd)

#BAC62380

Details
Data
Provenance
Resources

Locality: Åskagen, Persberg dist., Filipstad, Värmland, Sweden
Formula: CaNdAl₂Fe²⁺(SiO₄)(Si₂O₇)O(OH)
Availability: Sold
Size: 2 x 1.7 x 1.7 cm - Thumbnail
Tagged: REE mineral
Special Info: Type Locality

Black metamict mass of Allanite-(Nd).

Allanite-(Nd)

Collection: William & Anne Cook Collection
Special Info: Type Locality

Mineralpedia: View Allanite-(Nd)
On Dakota Matrix: Previously Sold Allanite-(Nd)
On Dakota Matrix: Other Available Allanite-(Nd)
WebMineral: View Allanite-(Nd)
Mindat: View Allanite-(Nd)

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Allanite-(Y) - BAC62384

Allanite-(Y) - BAC62384

Allanite-(Y)

#BAC62384

Details
Data
Provenance
Resources

Locality: Bancroft, Ontario, Canada
Formula: CaYFe²⁺Al₂(Si₂O₇)(SiO₄)O(OH)
Availability: Sold
Size: 2 x 1.1 x 0.2 cm - Thumbnail
Tagged: REE mineral

Single black, rough but complete crystal.

Allanite-(Y)

Formula: CaYFe²⁺Al₂(Si₂O₇)(SiO₄)O(OH)
Crystal System: Monoclinic
Crystal Habit: Massive - Granular, Disseminated
Cleavage: Imperfect, Imperfect, None
Luster: Vitreous - Greasy
Color: brown, black
Streak: grayish brown
Class: Monoclinic - Prismatic
Fracture: Conchoidal
Hardness: 5.5

Collection: William & Anne Cook Collection

On Dakota Matrix: Previously Sold Allanite-(Y)
On Dakota Matrix: Other Available Allanite-(Y)
WebMineral: View Allanite-(Y)
Mindat: View Allanite-(Y)

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