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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 rhabdophane-(ce), samarskite-(y), synchysite-(y), and tengerite-(y) and more from places like Mt. Karnasurt, Lovozero Massif, Kola Peninsula, Russia, Divinésia, Minas Gerais, Brazil, Mitchell Co., North Carolina, United States, Platte Canyon, Jefferson Co., Colorado, United States, Scrub Oak mine, Morris Co., New Jersey, United States, and Cardiff Uranium mine, Haliburton Co., Ontario, Canada.

Rhabdophane-(Ce)

#BW58037
Locality
Mt. Karnasurt, Lovozero Massif, Kola Peninsula, Russia 
Formula
CePO4·H2
Availability
Sold
Size
4 x 2.5 x 2 cm - Miniature 
Tagged
phosphate , REE mineral  

Yellowish brown to creamy colored Rhabdophane-(Ce) with Aegerine.


Rhabdophane-(Ce)

Formula
CePO4·H2
Crystal System
Hexagonal 
Crystal Habit
Massive, Mammillary, Encrustations 
Cleavage
None, None, None 
Luster
Greasy (Oily) 
Color
white, brownish white, yellowish white, pinkish white 
Streak
white 
Class
Hexagonal - Trapezohedral 
Fracture
Uneven 
Hardness
3.5 
Collection
Bill Wilson Collection

Samarskite-(Y)

with Columbite-Tantalite - #RS58160
Locality
Divinésia, Minas Gerais, Brazil 
Formula
(Y,Ce,U,Fe,Nb)(Nb,Ta,Ti)O4 
Availability
Available
Price
$175.00
Size
3 x 3 x 2 cm - Thumbnail 
Tagged
REE mineral  
Special Info
Radioactive!! 

Superb, terminated and well-formed crystal of rare Samarskite-(Y) with black Columite-Tantalite. Ytterbium may be found in Samarskite so a little 3.5cm vial of Ytterbium oxide is included.


Samarskite-(Y)

Formula
(Y,Ce,U,Fe,Nb)(Nb,Ta,Ti)O4 
Crystal System
Orthorhombic 
Crystal Habit
Massive 
Cleavage
Imperfect, None, None 
Luster
Vitreous - Resinous 
Color
black, brownish, yellowish brown 
Streak
reddish brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
5-6 
Collection
RC Stamberg Collection
Special Info
Radioactive!!

Samarskite-(Y)

#RS58161
Locality
Mitchell Co., North Carolina, United States 
Formula
(Y,Ce,U,Fe,Nb)(Nb,Ta,Ti)O4 
Availability
Sold
Size
2.3 x 1.8 x 1.2 cm - Thumbnail 
Tagged
REE mineral  
Special Info
Radioactive!! 

Dull black tabular crystal set to 2cm.


Samarskite-(Y)

Formula
(Y,Ce,U,Fe,Nb)(Nb,Ta,Ti)O4 
Crystal System
Orthorhombic 
Crystal Habit
Massive 
Cleavage
Imperfect, None, None 
Luster
Vitreous - Resinous 
Color
black, brownish, yellowish brown 
Streak
reddish brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
5-6 
Collection
RC Stamberg Collection
Special Info
Radioactive!!

Synchysite-(Y)

#RS58162
Locality
Platte Canyon, Jefferson Co., Colorado, United States 
Formula
CaY(CO3)2
Availability
Sold
Size
3.3 x 3 x 1.7 cm - Miniature 
Tagged
carbonate , REE mineral  

Dark red massive piece.


Synchysite-(Y)

Formula
CaY(CO3)2
Crystal System
Monoclinic 
Crystal Habit
Massive 
Cleavage
Distinct, None, None 
Luster
Earthy (Dull) 
Color
reddish brown 
Streak
brown 
Class
Monoclinic - Prismatic 
Hardness
6-6.5 
Collection
RC Stamberg Collection

Synchysite-(Y)

#RS58165
Locality
Scrub Oak mine, Morris Co., New Jersey, United States 
Formula
CaY(CO3)2
Availability
Sold
Size
4 x 2 x 2.5 cm - Miniature 
Tagged
carbonate , REE mineral  
Special Info
Type Locality 

Brick red grains to 5mm in magnetite.


Synchysite-(Y)

Formula
CaY(CO3)2
Crystal System
Monoclinic 
Crystal Habit
Massive 
Cleavage
Distinct, None, None 
Luster
Earthy (Dull) 
Color
reddish brown 
Streak
brown 
Class
Monoclinic - Prismatic 
Hardness
6-6.5 
Special Info
Type Locality

Tengerite-(Y)

#RS58163
Locality
Cardiff Uranium mine, Haliburton Co., Ontario, Canada 
Formula
Y2(CO3)3·2-3H2
Availability
Sold
Size
7 x 4.5 x 3.2 cm - Sm Cabinet 
Tagged
carbonate , REE mineral  

White, flaky and pearly plates of Tengerite-(Y).


Tengerite-(Y)

Formula
Y2(CO3)3·2-3H2
Crystal System
Orthorhombic 
Crystal Habit
Fibrous, Pulverulent 
Luster
Vitreous - Dull 
Color
white 
Streak
white 
Class
Orthorhombic - Pyramidal 
Hardness
Collection
Robert J. Waidler Collection

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