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1 item @ $40.00  

Rare Earth Minerals

Thursday, 31 August 2023 12:30 PM

Rare Earth Minerals are those minerals which contain a rare earth element such as yttrium, lanthanum, cerium etc. There are 17 REE's all together and each are used in high tech applications such as computers, cell phones, and televisions to name just a few.

SOLD
Lanthanite-(Ce) - BAC62383
Lanthanite-(Ce) - BAC62383

Lanthanite-(Ce)

in Baryte - #BAC62383
Locality
Nâm Xe REE deposit, Mt Fansipan, Phong Tho dist., Lai Châu Prov., Vietnam 
Formula
Ce2(CO3)3·8H2
Availability
Sold
Size
2 x 2 x 1.8 cm - Thumbnail 
Tagged
carbonate , REE mineral  

Pinkish red granular Lanthanite in Baryte.


Lanthanite-(Ce)

Formula
Ce2(CO3)3·8H2
Crystal System
Orthorhombic 
Crystal Habit
Platy 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
colorless 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Sectile 
Hardness
2.5 
Collection
William & Anne Cook Collection
SOLD
Manganiandrosite-(La) - BAC62356
Manganiandrosite-(La) - BAC62356

Manganiandrosite-(La)

#BAC62356
Locality
Grubependity Lake cirque, Maldynyrd range, Komi Republic, Russia 
Formula
Mn2+La3+AlMn3+Mn2+(Si2O7)(SiO4)O(OH) 
Availability
Sold
Size
0.9 x 0.7 x 0.5 cm - Thumbnail 
Tagged
REE mineral  

Red granular crystal grains to about 0.3mm pervasive in matrix.


Manganiandrosite-(La)

Formula
Mn2+La3+AlMn3+Mn2+(Si2O7)(SiO4)O(OH) 
Crystal System
Monoclinic 
Luster
Vitreous (Glassy) 
Color
reddish brown 
Class
Monoclinic - Prismatic 
Hardness
Collection
William & Anne Cook Collection

Melanocerite-(Ce)

#BAC62376
Locality
Cardiff Uranium mine, Haliburton Co., Ontario, Canada 
Formula
(Ce,Ca)5(SiO4,BO4)3(OH,0) 
Availability
Sold
Size
5.5 x 3.5 x 3 cm - Sm Cabinet 
Tagged
REE mineral  

A course granular mass with dark purple Fluorite and dark brownish red crystal grains of Melanocerite generally around 5mm. 


Melanocerite-(Ce)

Formula
(Ce,Th,Ca)5(Si,B)3O12(OH,F)�n(H2O) (?) 
Crystal System
Trigonal 
Crystal Habit
Tabular, Metamict 
Cleavage
None, None, None 
Luster
Resinous 
Color
brown, black, dark brown, reddish brown 
Streak
light brown 
Class
Trigonal 
Fracture
Brittle - Conchoidal 
Hardness
5-6 
Collection
William & Anne Cook Collection
SOLD
Menzerite-(Y) - BAC62395
Menzerite-(Y) - BAC62395

Menzerite-(Y)

inclusions in Almandine - #BAC62395
Locality
Bonnet Island, Georgian Bay, Parry Sound dist., Ontario, Canada 
Formula
Y2CaMg2Si3O12 
Availability
Sold
Size
5 x 3.5 x 4 cm - Miniature 
Tagged
REE mineral  
Special Info
Type Locality 

Submicroscopic inclusions in Almandine. See Menzerite page on Mindat (click here). Menzerite is a two-locality mineral and this is the type locality.


Collection
William & Anne Cook Collection
Special Info
Type Locality
SOLD
Monazite-(La) - BAC62397
Monazite-(La) - BAC62397

Monazite-(La)

#BAC62397
Locality
Shinkolobwe, Katanga, Democratic Republic of Congo 
Formula
LaPO4 
Availability
Sold
Size
4 x 2.5 x 1 cm - Miniature 
Tagged
phosphate , REE mineral  

Massive beige Monazite.


Monazite-(La)

Formula
LaPO4 
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Fine, Twinning Common 
Cleavage
Distinct, Indistinct, None 
Luster
Adamantine - Resinous 
Color
brown, brown, yellowish brown, pink, yellow 
Streak
grayish white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
5-5.5 
Collection
William & Anne Cook Collection

Monazite-(Nd)

with Parisite-(Nd) - #BAC62396
Locality
Kangankunde Carbonatite Complex, Balaka, Southern Region, Malawi 
Formula
NdPO4 
Availability
Sold
Size
2.5 x 2.2 x 2 cm - Thumbnail 
Tagged
phosphate , REE mineral  

Bottle green subhedral Monazite to 3-4mm associated with dark brown Parizite.


Monazite-(Nd)

Formula
NdPO4 
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Fine, Twinning Common 
Cleavage
Distinct, Indistinct, None 
Luster
Adamantine - Resinous 
Color
brown, red, yellow, orange 
Streak
grayish white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
5-5.5 
Collection
William & Anne Cook Collection

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