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Recently Released Special Editions

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.

Agardite-(Ce) - BAC62377
Agardite-(Ce) - BAC62377

Agardite-(Ce)

#BAC62377
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
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Bastnasite-(Ce) - 61291
Bastnasite-(Ce) - 61291

Bastnasite-(Ce)

#61291
Locality
Andakatany, Manandriana, Amoron'i Mania, Madagascar 
Formula
CeCO3F 
Availability
Available
Price
$50.00
Size
3 x 3 x 2.5 cm - Thumbnail 
Tagged
carbonate , REE mineral  

Shiny brick-red, cleavable mass with nice vitreous luster.


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 
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Decrespignyite-(Y) - 59804
Decrespignyite-(Y) - 59804

Decrespignyite-(Y)

#59804
Locality
Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia 
Formula
Y4Cu(CO3)4Cl(OH)5·2H2O 
Availability
Available
Price
$50.00
Size
4 x 3 x 1.4 cm - Miniature 
Tagged
carbonate , copper , REE mineral  
Special Info
Type Locality 

Rich specimen with spheroidal crystal groups and crusts of Decrespignyite-(Y).


Decrespignyite-(Y)

Formula
Y4Cu(CO3)4Cl(OH)5·2H2O 
Crystal System
Monoclinic 
Crystal Habit
Efflorescences, Globular 
Cleavage
None, None, None 
Luster
Vitreous - Pearly 
Color
intense royal blue, turquoise blue 
Streak
pale blue 
Class
Monoclinic 
Hardness
4 
Special Info
Type Locality
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Tengerite-(Y) - 59814
Tengerite-(Y) - 59814

Tengerite-(Y)

#59814
Locality
Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia 
Formula
Y2(CO3)3·2-3H2O 
Availability
Available
Price
$50.00
Size
4.5 x 5 x 1.3 cm - Miniature 
Tagged
carbonate , REE mineral  

Pearly white platy crystals in scattered singles and some radial groups. Most of the coverage is on one side.


Tengerite-(Y)

Formula
Y2(CO3)3·2-3H2O 
Crystal System
Orthorhombic 
Crystal Habit
Fibrous, Pulverulent 
Luster
Vitreous - Dull 
Color
white 
Streak
white 
Class
Orthorhombic - Pyramidal 
Hardness
- 
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