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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

Details
Data
Provenance
Resources

Locality: Nâm Xe REE deposit, Mt Fansipan, Phong Tho dist., Lai Châu Prov., Vietnam
Formula: Ce₂(CO₃)₃·8H₂O
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)₃·8H₂O
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

On Dakota Matrix: Previously Sold Lanthanite-(Ce)
On Dakota Matrix: Other Available Lanthanite-(Ce)
WebMineral: View Lanthanite-(Ce)
Mindat: View Lanthanite-(Ce)

SOLD

Manganiandrosite-(La) - BAC62356

Manganiandrosite-(La) - BAC62356

Manganiandrosite-(La)

#BAC62356

Details
Data
Provenance
Resources

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

On Dakota Matrix: Previously Sold Manganiandrosite-(La)
On Dakota Matrix: Other Available Manganiandrosite-(La)
WebMineral: View Manganiandrosite-(La)
Mindat: View Manganiandrosite-(La)

SOLD

Melanocerite-(Ce) - BAC62376

Melanocerite-(Ce) - BAC62376

Melanocerite-(Ce)

#BAC62376

Details
Data
Provenance
Resources

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

On Dakota Matrix: Previously Sold Melanocerite-(Ce)
On Dakota Matrix: Other Available Melanocerite-(Ce)
WebMineral: View Melanocerite-(Ce)
Mindat: View Melanocerite-(Ce)

SOLD

Menzerite-(Y) - BAC62395

Menzerite-(Y) - BAC62395

Menzerite-(Y)

inclusions in Almandine - #BAC62395

Details
Provenance
Resources

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

On Dakota Matrix: Previously Sold Menzerite-(Y)
On Dakota Matrix: Other Available Menzerite-(Y)
WebMineral: View Menzerite-(Y)
Mindat: View Menzerite-(Y)

SOLD

Monazite-(La) - BAC62397

Monazite-(La) - BAC62397

Monazite-(La)

#BAC62397

Details
Data
Provenance
Resources

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

Mineralpedia: View Monazite-(La)
On Dakota Matrix: Previously Sold Monazite-(La)
On Dakota Matrix: Other Available Monazite-(La)
WebMineral: View Monazite-(La)
Mindat: View Monazite-(La)

SOLD

Monazite-(Nd) - BAC62396

Monazite-(Nd) - BAC62396

Monazite-(Nd)

with Parisite-(Nd) - #BAC62396

Details
Data
Provenance
Resources

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

Mineralpedia: View Monazite-(Nd)
On Dakota Matrix: Previously Sold Monazite-(Nd)
On Dakota Matrix: Other Available Monazite-(Nd)
WebMineral: View Monazite-(Nd)
Mindat: View Monazite-(Nd)

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