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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.

SOLD
Allanite-(Nd) - BAC62380
Allanite-(Nd) - BAC62380

Allanite-(Nd)

#BAC62380
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

Allanite-(Y)

#BAC62384
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

Askagenite-(Nd)

#BAC62379
Locality
Åskagen, Persberg dist., Filipstad, Värmland, Sweden 
Formula
Mn2+NdAl2Fe3+(Si2O7)(SiO4)O2 
Availability
Sold
Size
2 x 1.5 x 1 cm - Thumbnail 
Tagged
REE mineral  

Dark brown to black metamict mass of Askagenite-(Nd). This is the type and only locality.


Askagenite-(Nd)

Collection
William & Anne Cook Collection

Bastnasite-(Ce)

#62350
Locality
Bull Hill, Bear Lodge Mountains, Crook Co., Wyoming, United States 
Formula
CeCO3
Availability
Sold
Size
6 x 5.5 x 5.5 cm - Sm Cabinet 
Tagged
carbonate , REE mineral  

A resinous, metamict matrix with yellow pods of Bastnesite thought to be replacements after Burbankite. This deposit is still under exploration and processing studies by Rare Element Resources. The best source of information can be found in this pdf by Roche Engineering: Bear Lodge Project.


Bastnasite-(Ce)

Formula
CeCO3
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 

Bastnasite-(Ce)

#BAC62400
Locality
Sphene Ghari, Nanger, Afghanistan 
Formula
CeCO3
Availability
Sold
Size
1.3 x 1.6 x 1.2 cm - Thumbnail 
Tagged
carbonate , REE mineral  

Deep red hexagonal crystal, terminated.


Bastnasite-(Ce)

Formula
CeCO3
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 
Collection
William & Anne Cook Collection
SOLD
Britholite-(Y) - BAC62390
Britholite-(Y) - BAC62390

Britholite-(Y)

#BAC62390
Locality
Burpala alkaline Massif, Eastern-Siberian region, Russia 
Formula
(Y,Ca)5(SiO4)3OH 
Availability
Sold
Size
5 x 3.5 x 4 cm - Miniature 
Tagged
REE mineral  

Dark red resinous and glassy crystalline mass.


Britholite-(Y)

Formula
(Y,Ca)5(SiO4)3OH 
Crystal System
Hexagonal 
Crystal Habit
Prismatic, Massive 
Cleavage
Imperfect, Imperfect, None 
Luster
Resinous 
Color
reddish brown, black 
Streak
pale brown 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
Collection
William & Anne Cook Collection

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