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Rare Earth Minerals

Thursday, 27 February 2020 12:00 PM

Introducing the "Rare Earth Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including holmium oxide, iimoriite-(y), kamphaugite-(y), karnasurtite-(ce), kimuraite-(y), and lecoqite-(y) and more from places like no locality, Åskagen, Persberg dist., Filipstad, Värmland, Sweden, Telemark, Norway, Kol'skiy, Poluostrov, Lovozero, Kola Peninsula, Russia, Kirigo, Hizen-cho, Higashi-Matsuura-gun, Saga, Kyushu Island, Japan, and Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada.

Holmium Oxide

#52265
Locality
no locality 
Formula
Ho2O3 
Availability
Available
Price
$40.00
Size
4 x 1 x 1 cm - Miniature 
Tagged
REE oxide  

Small vial of Holmium oxide.


Iimoriite-(Y)

#38533
Locality
Åskagen, Persberg dist., Filipstad, Värmland, Sweden 
Formula
Y2(SiO4)(CO3
Availability
Sold
Size
4.5 x 2 x 2 cm - Miniature 
Tagged
carbonate , REE mineral  

Massive Iimoriite-(Y) shown as yellowish brown and pinkish zones.


Iimoriite-(Y)

Formula
Y2(SiO4)(CO3
Crystal System
Triclinic 
Cleavage
Distinct, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, gray pink, white, purple gray 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
5.5-6 

Kamphaugite-(Y)

#PD35396
Locality
Telemark, Norway 
Formula
Ca2Y2(CO3)4(OH)2·3H2
Availability
Available
Price
$50.00
Size
2.5 x 1.2 x 1 cm - Thumbnail 
Tagged
carbonate , REE mineral  

Tiny tannish spheroidal or crude rosettes of rare Kamphaugite-(Y). Kamphaugite-(Y) was first approved as a new IMA mineral in 1987, so fairly recent for a REE mineral. 


Kamphaugite-(Y)

Formula
Ca2Y2(CO3)4(OH)2·3H2
Crystal System
Tetragonal 
Crystal Habit
Spherical 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, white, light yellow 
Streak
white 
Class
Tetragonal - Trapezohedral 
Hardness
2-3 

Karnasurtite-(Ce)

#PD52152
Locality
Kol'skiy, Poluostrov, Lovozero, Kola Peninsula, Russia 
Formula
CeTiAlSi2O7(OH)4·3H2
Availability
Available
Price
$75.00
Size
2 x 1 x 1 cm - Thumbnail 
Tagged
REE mineral  

A 2mm veinlet of honey yellow Karnasurtite-(Ce). Karnasurtite-(Ce) is amorphous, but still an approved IMA mineral and first published in 1959. The mineral may also incorporate lanthanum. It is only found in three localities in Cananda and Russia. This comes with a Russian label. 


Karnasurtite-(Ce)

Formula
CeTiAlSi2O7(OH)4·3H2
Crystal System
Hexagonal 
Crystal Habit
Metamict 
Cleavage
Good, None, None 
Luster
Greasy (Oily) 
Color
yellow, honey, light yellow 
Streak
light yellow 
Class
Hexagonal 
Fracture
Brittle 
Hardness
Collection
Don Phillips Collection

Kimuraite-(Y)

#PD52151
Locality
Kirigo, Hizen-cho, Higashi-Matsuura-gun, Saga, Kyushu Island, Japan 
Formula
CaY2(CO3)4·6H2
Availability
Available
Price
$40.00
Size
Capsule 
Tagged
phosphate , REE mineral  
Special Info
Type Locality 

White silky looking Kimuraite-(Y). There are approximately 192 IMA and undefined yttrium rare earth minerals. 


Kimuraite-(Y)

Formula
CaY2(CO3)4·6H2
Crystal System
Orthorhombic 
Crystal Habit
Spherical, Aggregates 
Cleavage
Perfect, None, None 
Luster
Vitreous - Silky 
Color
white, light purple pink, light pink 
Streak
white 
Class
Orthorhombic 
Hardness
2.5 
Special Info
Type Locality

Lecoqite-(Y)

#44139
Locality
Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada 
Formula
Na3Y(CO3)3·6H2
Availability
Available
Price
$40.00
Size
Capsule 
Tagged
carbonate , REE mineral  
Special Info
Type Locality 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 
Special Info
Author's Material 

Lecoqite-(Y) is a relatively new mineral, which was published in 2010 by Pekov et al. In the capsule a little bit of white fibrous crystals. It is a portion of the author's study material.


Lecoqite-(Y)

Special Info
Type Locality
Special Info
XRD Confirmed
Special Info
EDS Confirmed
Special Info
Author's Material

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