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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 decrespignyite-(y), diversilite-(ce), dysprosium oxide, erbium oxide, fluorcerite-(ce), and holmium oxide and more from places like Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia, Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia, no locality, Österby, St. Skedevi, Säter, Dalarna County, Sweden.

Decrespignyite-(Y)

#36350
Locality
Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia 
Formula
Y4Cu(CO3)4Cl(OH)5·2H2
Availability
Available
Price
$125.00
Size
6 x 5 x 1.5 cm - Sm Cabinet 
Tagged
carbonate , copper , REE mineral  

Bright sky blue globular crystal aggregtes to 0.75mm and as large patches or crusts 3 x4mm in area. Decrespignyite-(Y) is a yttrium - copper bearing REM and a carbonate. It is according to Mindat composed of individual tiny pseudohexagonal, often curved platelets. It is found at only one locality worldwide.

As noted by the mineral name, Decrespignyite-(Y), contains the rare-earth element yttrium. Major applications of yttrium are extensive and include fluorescent lamps, phosphor compounds in computer monitirs, lasers, lighting applications, abrasives, bearings, and high-temperature alloys amongst others. Recent cost for yttrium oxide in 2019 was $14/lb down from $65/1b in 2011. The main source for yttrium is China, but worldwide reserves are found in Australia, Brazil, and India.


Decrespignyite-(Y)

Formula
Y4Cu(CO3)4Cl(OH)5·2H2
Crystal System
Monoclinic 
Crystal Habit
Efflorescences, Globular 
Cleavage
None, None, None 
Luster
Vitreous - Pearly 
Color
intense royal blue, turquoise blue 
Streak
pale blue 
Class
Monoclinic 
Hardness

Diversilite-(Ce)

#44106
Locality
Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia 
Formula
Na2Ba6Ce2Fe2+Ti3Si12O36(OH)10·nH2
Availability
Available
Price
$75.00
Size
2.5 x 2 x 1.5 cm - Thumbnail 
Tagged
REE mineral  
Special Info
Type Locality 

Tan platy crystals to 2mm in one place. Type and only locality. Extremely rare.


Diversilite-(Ce)

Formula
Na2Ba6Ce2Fe2+Ti3Si12O36(OH)10·nH2
Crystal System
Trigonal 
Crystal Habit
Fan Shaped, Subhedral Crystals, Platy 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
yellowish orange 
Streak
white 
Class
Trigonal - Pyramidal 
Fracture
Brittle - Conchoidal 
Hardness
Special Info
Type Locality

Dysprosium Oxide

#52267
Locality
no locality 
Formula
Dy2O3 
Availability
Available
Price
$33.00
Size
4 x 1 x 1 cm - Miniature 
Tagged
REE oxide  

Small vial of Dysprosium oxide.


Erbium Oxide

#52263
Locality
no locality 
Formula
Er2O3 
Availability
Available
Price
$41.00
Size
4 x 1 x 1 cm - Miniature 
Tagged
REE oxide  

Small vial of Erbium oxide.


Fluorcerite-(Ce)

#25326
Locality
Österby, St. Skedevi, Säter, Dalarna County, Sweden 
Formula
(Ce,La)F3 
Availability
Available
Price
$40.00
Size
2 x 2 x 2 cm - Thumbnail 
Tagged
REE mineral  

Six small chips from 1 to 2cm yellowish to pinkish Fluorcerite-(Ce). 


Fluorcerite-(Ce)

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.


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