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

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), tengerite-(y), and terbium oxide and more from places like Mt. Karnasurt, Lovozero Massif, Kola Peninsula, Russia, Mitchell Co., North Carolina, United States, Platte Canyon, Jefferson Co., Colorado, United States, Scrub Oak mine, Morris Co., New Jersey, United States, Cardiff Uranium mine, Haliburton Co., Ontario, Canada, and no locality.

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)

#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
SOLD
Terbium oxide - 58175
Terbium oxide - 58175

Terbium Oxide

#58175
Locality
no locality 
Formula
Tb4O7 
Availability
Sold
Size
3.5 x 1 x 1 cm - Miniature 
Tagged
REE mineral  

A small vial of terbium oxide concentrate. There are no approved IMA minerals which contain Terbium. However, there is one unknown possible gadolinite member published on Mindat with the chemical formula of Ca(Y,Ce,Nd,Tb,Er)Be2Si2(O,OH)10


All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2022 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map