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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 luteium oxide, melanocerite-(ce), monazite-(ce), parisite-(ce), perrierite-(ce), and perrierite-(la) and more from places like no locality, Cardiff Uranium mine, Haliburton Co., Ontario, Canada, Jakkalswater, Steinkopf, Northern Cape, South Africa, Snowbird mine, Lola Pass, Mineral Co., Montana, United States, Burley Farm, near Amherst, Nelson Co., Virginia, United States, and Buer, Bjørkedalen, Porsgrunn, Telemark, Norway.

Luteium Oxide

#58180
Locality
no locality 
Formula
Lu2O3 
Availability
Available
Price
$95.00
Size
3.5 x 1 x 1 cm - Miniature 
Tagged
REE mineral  

A small vial of luteium oxide. At presentg, there are no know minerals with the element Luteium in the composition.


Melanocerite-(Ce)

#BW58024
Locality
Cardiff Uranium mine, Haliburton Co., Ontario, Canada 
Formula
(Ce,Ca)5(SiO4,BO4)3(OH,0) 
Availability
Sold
Size
6 x 2 x 2 cm - Sm Cabinet 
Tagged
REE mineral  

Black to brown greasy looking crystal grains to 1cm. Melanocerite contains the REE cerium used in oil cracking during petroleum refining and used as a yellow coloring agent in ceramic and glass. 


Melanocerite-(Ce)

Formula
(Ce,Th,Ca)5(Si,B)3O12(OH,F)´┐Żn(H2O) (?) 
Crystal System
Trigonal 
Crystal Habit
Tabular, Metamict 
Cleavage
None, None, None 
Luster
Resinous 
Color
brown, black, dark brown, reddish brown 
Streak
light brown 
Class
Trigonal 
Fracture
Brittle - Conchoidal 
Hardness
5-6 
Collection
Bill Wilson Collection

Monazite-(Ce)

#BW58043
Locality
Jakkalswater, Steinkopf, Northern Cape, South Africa 
Formula
CePO4 
Availability
Sold
Size
4 x 2.5 x 1 cm - Miniature 
Tagged
phosphate , REE mineral , pegmatite mineral  
Special Info
Radioactive!! 

Monazite is a rare earth mineral and may also contain uranium, tantalum and titanium. This locality is a NYF (niobium-yttrium-fluorine) pegmatite, which can contain many rare earth minerals. Monazite may contain other REE's such as lanthanum, yttrium aside from thorium.


Monazite-(Ce)

Formula
CePO4 
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Fine, Twinning Common 
Cleavage
Distinct, Indistinct, None 
Luster
Adamantine - Resinous 
Color
brown, colorless, greenish, gray white, yellow 
Streak
grayish white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
5-5.5 
Collection
Bill Wilson Collection
Special Info
Radioactive!!

Parisite-(Ce)

#BW58036
Locality
Snowbird mine, Lola Pass, Mineral Co., Montana, United States 
Formula
CaCe2(CO3)3F2 
Availability
Sold
Size
4 x 1.5 x 2 cm - Miniature 
Tagged
carbonate , REE mineral  

Reddish brown large crystal shaped like a tornado.


Parisite-(Ce)

Formula
CaCe2(CO3)3F2 
Crystal System
Trigonal 
Crystal Habit
Acicular, Striated, Prismatic 
Cleavage
Distinct, None, None 
Luster
Vitreous - Greasy 
Color
brown, brownish yellow, grayish yellow, yellow 
Streak
white 
Class
Trigonal - Pyramidal 
Fracture
Brittle 
Hardness
4.5 
Collection
Bill Wilson Collection

Perrierite-(Ce)

#BW58023
Locality
Burley Farm, near Amherst, Nelson Co., Virginia, United States 
Formula
Ce4MgFe3+2Ti4+2O8(Si2O7)2 
Availability
Sold
Size
4.5 x 2.5 x 1.5 cm - Miniature 

Heavy black massive specimen containing the rare earth element cerium. Perrierite is usually metamict

Cerium is used in the manufacture of battery alloys, metal alloys, catalysts in autos, and glass additives to name a few. From the 1950's to the 2000's it was used in lapidary polishing agents. Price increases eliminated the use. Aluminum and titanium oxides are now used.

Best ref.: Arthur A. Pegau (1932) Pegmatite Deposits of Virginia. Virginia Geological Survey; Bulletin 33.


Perrierite-(Ce)

Formula
Ce4MgFe3+2Ti4+2O8(Si2O7)2 
Crystal System
Monoclinic 
Crystal Habit
Metamict, Prismatic, Massive 
Luster
Resinous 
Color
black, brownish, dark reddish brown 
Streak
brown 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal - Uneven 
Hardness
5.5 
Collection
Bill Wilson Collection

Perrierite-(La)

#BW58046
Locality
Buer, Bjørkedalen, Porsgrunn, Telemark, Norway 
Formula
(La,Ce,Ca)4(Fe2+,Mn)(Ti,Fe3+,Al)4(Si2O7)2O8 
Availability
Sold
Size
4 x 3.5 x 2.5 cm - Miniature 
Tagged
REE mineral  
Special Info
Type Locality 

This is the type locality for this rare earth mineral. It is one of three localities worldwide. The Perrierite is lanthanum bearing and can be seen on this specimen as black crystal grains to 1mm. It is associated with Microcline, Zircon, and garnet. The host rock is a syenite defined as a magmatic deposit containing less than 5% Quartz and is peralkaline (rich in K, poor in Ca).

Lanthanum was discovered in 1839 by the Swedish chemist, Carl Gustav Mosander. It is used for specialy glass, lighting, and hybrid car batteries.


Collection
Bill Wilson Collection
Special Info
Type Locality

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