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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 samarium oxide, sazykinaite-(y), schuilingite-(nd), tadzhikite-(ce), tantalaeschynite-(y), and terbium oxide and more from places like no locality, Koashva Mt., Khibiny Massif, Kola Peninsula, Russia, Kasompi mine, Swambo, Katanga, Democratic Republic of Congo, Barkevik, Langesundsfjorden, Larvik, Vestfold, Norway, Raposa pegmatite, São José do Sabugi, Paraíba, Brazil.

Samarium Oxide

#52266
Locality
no locality 
Formula
Sm2O3 
Availability
Available
Price
$29.00
Size
4 x 1 x 1 cm - Miniature 

Small vial of samarium oxide. 


Sazykinaite-(Y)

#41391
Locality
Koashva Mt., Khibiny Massif, Kola Peninsula, Russia 
Formula
Na5YZrSi6O18·6H2
Availability
Sold
Size
4.5 x 4 x 3 cm - Miniature 
Tagged
REE mineral  
Special Info
Type Locality 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 

Dirty white rhombic crystals to 1mm (rich) with green aegerine. 


Sazykinaite-(Y)

Formula
Na5YZrSi6O18·6H2
Crystal System
Trigonal 
Crystal Habit
Crystalline - Fine 
Cleavage
Imperfect, None, None 
Luster
Vitreous (Glassy) 
Color
light green, yellow 
Streak
white 
Class
Trigonal - Trapezohedral 
Fracture
Brittle 
Hardness
Special Info
Type Locality
Special Info
XRD Confirmed
Special Info
EDS Confirmed

Schuilingite-(Nd)

#PD52359
Locality
Kasompi mine, Swambo, Katanga, Democratic Republic of Congo 
Formula
CuPbNd(CO3)3(OH)·1.5H2
Availability
Sold
Size
1.7 x 1 x 1.6 cm - Thumbnail 
Tagged
carbonate , copper , REE mineral  
Special Info
Type Locality 

Bluish green patches to 1mm and less. Sparse coverage. Rare.


Schuilingite-(Nd)

Formula
CuPbNd(CO3)3(OH)·1.5H2
Crystal System
Orthorhombic 
Cleavage
Perfect, None, None 
Luster
Adamantine 
Color
azure, turquoise 
Streak
light blue 
Class
Orthorhombic - Pyramidal 
Hardness
3-4 
Collection
Don Phillips Collection
Special Info
Type Locality

Tadzhikite-(Ce)

#PD40064
Locality
Barkevik, Langesundsfjorden, Larvik, Vestfold, Norway 
Formula
Ca4Ce3+2TiB4Si4O22(OH)2 
Availability
Available
Price
$55.00
Size
3.5 x 2.5 x 2.5 cm - Miniature 
Tagged
REE mineral  

Brown embedded plates of Tadzhikite-(Ce) with Fluorite and other minerals.


Tadzhikite-(Ce)

Formula
Ca4Ce3+2TiB4Si4O22(OH)2 
Crystal System
Monoclinic 
Cleavage
Distinct, None, None 
Luster
Vitreous (Glassy) 
Color
gray brown, reddish brown 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
Collection
Don Phillips Collection
SOLD
Tantalaeschynite-(Y) - PD52153
Tantalaeschynite-(Y) - PD52153

Tantalaeschynite-(Y)

#PD52153
Locality
Raposa pegmatite, São José do Sabugi, Paraíba, Brazil 
Formula
Y(Ta,Ti,Nb)2O6 
Availability
Sold
Size
0.5 x 0.3 x 0.3 cm - Thumbnail 
Tagged
REE mineral  
Special Info
Type Locality 

A 5mm chip of Tantalaeschynite-(Y), a black rare-earth mineral with a resinous luster. It is named for the tantalian end-member of a series with aeschynite-(Y). Tantalaeschynite-(Y) is very rare and found, according to Mindat, is found in only (published) three deposits worldwide. This is the type locality.


Tantalaeschynite-(Y)

Formula
Y(Ta,Ti,Nb)2O6 
Crystal System
Orthorhombic 
Crystal Habit
Metamict 
Cleavage
None, None, None 
Luster
Resinous 
Color
brownish black, black 
Streak
yellowish brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
5.5-6 
Collection
Don Phillips Collection
Special Info
Type Locality

Terbium Oxide

#52270
Locality
no locality 
Formula
Tb4O7 
Availability
Available
Price
$45.00
Size
4 x 1 x 1 cm - Miniature 
Tagged
REE oxide  

Small vial of Terbium oxide.


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