mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

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.

Aeschynite-(Ce)

#BAC62393
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

Agardite-(Ce)

#BAC62377
Locality
Laurium, Attika, Greece 
Formula
Cu2+6Ce(AsO4)3(OH)6·3H2
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)6·3H2
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
Collection
William & Anne Cook Collection

Agardite-(Nd)

#BAC62355
Locality
Big 3 mine, Esmeralda Co., Nevada, United States 
Formula
Cu2+6Nd(AsO4)3(OH)6·3H2
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)6·3H2
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
SOLD
Allanite-(La) - BAC62388
Allanite-(La) - BAC62388

Allanite-(La)

#BAC62388
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
Collection
William & Anne Cook Collection
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

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2023 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map