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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

Bastnasite-(Ce)

#58200
Locality
Mountain Pass mine, San Bernardino Co., California, United States 
Formula
CeCO3
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
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 
SOLD
Burbankite - BW58050
Burbankite - BW58050

Burbankite

#BW58050
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

Cerite-(Ce)

#BW58053
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

Cerite-(La)

with Ancylite-(Ce) - #BW58028
Locality
Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia 
Formula
(La,Ce,Ca)9(Fe,Ca,Mg)(SiO4)3(SiO3OH)4(OH)3 
Availability
Available
Price
$75.00
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
Collection
Bill Wilson Collection
Special Info
Type Locality

Cheralite

with Euxenite - #BW58029
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

Chevkinite-(Ce)

#BW58035
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

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