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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

Fluorite - 62348

Fluorite - 62348

Fluorite

var. yttrofluorite - #62348

Details
Data
Provenance
Resources

Locality: near Foxton, Jefferson Co., Colorado, United States
Formula: (Ca_1-xY_x)F²⁺x where 0.05< x
Availability: Sold
Size: 11 x 6.5 x 4 cm - Cabinet
Tagged: REE mineral

A large mass of pinkish or flesh colored "yttrofluorite", a discredited species and redefined as a variety of Fluorite since yttrium only substitutes for calcium in the Fluorite in small amounts.

Fluorite

Formula: CaF₂
Crystal System: Isometric
Crystal Habit: Crystalline - Coarse, Massive - Granular, Disseminated
Cleavage: Three perfect, octahedral cleavages.
Luster: Vitreous (Glassy)
Color: purple, clear, yellow, green, red, blue
Streak: white
Geological Setting: Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments
Class: Isometric - Hexoctahedral
Fracture: Uneven
Hardness: 4

Mineralpedia: View Fluorite
On Dakota Matrix: Previously Sold Fluorite
On Dakota Matrix: Other Available Fluorite
WebMineral: View Fluorite
Mindat: View Fluorite

SOLD

Haleniusite-(La) - BAC62394

Haleniusite-(La) - BAC62394

Haleniusite-(La)

with Cerite-(Ce) & Ferriallanite-(Ce) - #BAC62394

Details
Data
Provenance
Resources

Locality: Bastnäs mines, Riddarhyttan, Västmanland, Sweden
Formula: LaOF
Availability: Sold
Size: 4.5 x 2.5 x 2 cm - Miniature
Tagged: REE mineral
Special Info: Type Locality

Yellow very very fine crystalline Haleniusite-(La) on Cerite (purplish) and Ferriallanite (black) matrix.

Haleniusite-(La)

Formula: LaOF
Crystal System: Isometric
Crystal Habit: Powdery
Cleavage: Unknown, Unknown, Unknown
Luster: Earthy (Dull)
Color: light yellow
Streak: pale yellow
Class: Isometric - Hexoctahedral
Hardness: -

Collection: William & Anne Cook Collection
Special Info: Type Locality

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

SOLD

Kainosite-(Y) - BAC62354

Kainosite-(Y) - BAC62354

Kainosite-(Y)

#BAC62354

Details
Data
Provenance
Resources

Locality: Mount Malosa, Zomba Plateau, Malawi
Formula: Ca₂Y₂(SiO₃)₄(CO₃)·H₂O
Availability: Sold
Size: 3.5 x 3 x 2.5 cm - Miniature
Tagged: carbonate , REE mineral

A brown plumose crystal group with a tabular Microcline crystal. Vey good specimen.

Kainosite-(Y)

Formula: Ca₂Y₂(SiO₃)₄(CO₃)·H₂O
Crystal System: Orthorhombic
Crystal Habit: Prismatic, Wheat Sheaf
Cleavage: Good, None, None
Luster: Vitreous - Resinous
Color: brown, colorless, green yellow, yellow, light yellow brown
Streak: white
Class: Orthorhombic - Dipyramidal
Fracture: Brittle - Uneven
Hardness: 5-6

Collection: William & Anne Cook Collection

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

SOLD

Kamphaugite-(Y) - 59807

Kamphaugite-(Y) - 59807

Kamphaugite-(Y)

#59807

Details
Data
Provenance
Resources

Locality: Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia
Formula: Ca₂Y₂(CO₃)₄(OH)₂·3H₂O
Availability: Sold
Size: 5.6 x 3.3 x 0.8 cm - Sm Cabinet
Tagged: carbonate , REE mineral

Rich, thick coverage of creamy white spheroidal crystal groups to about 0.5mm.

Kamphaugite-(Y)

Formula: Ca₂Y₂(CO₃)₄(OH)₂·3H₂O
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

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

SOLD

Kamphaugite-(Y) - BAC62382

Kamphaugite-(Y) - BAC62382

Kamphaugite-(Y)

#BAC62382

Details
Data
Provenance
Resources

Locality: Hørtekollen, Sylling, Lier, Viken, Norway
Formula: Ca₂Y₂(CO₃)₄(OH)₂·3H₂O
Availability: Sold
Size: 3.5 x 2 x 1.7 cm - Miniature
Tagged: carbonate , REE mineral
Special Info: Type Locality

Glassy yellow-brown Kamphaugite-(Y) with Fluorite.

Kamphaugite-(Y)

Formula: Ca₂Y₂(CO₃)₄(OH)₂·3H₂O
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

Collection: William & Anne Cook Collection
Special Info: Type Locality

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

SOLD

Kozoite-(Nd) - BAC62391

Kozoite-(Nd) - BAC62391

Kozoite-(Nd)

#BAC62391

Details
Data
Provenance
Resources

Locality: Mitsukoshi, Hizen-cho, Karatsu City, Saga, Kyushu, Japan
Formula: NdCO₃(OH)
Availability: Sold
Size: 1.8 x 1 x 1 cm - Thumbnail
Tagged: carbonate , REE mineral

Pink crystal groups to less than 1mm. A three locality REE mineral.

Kozoite-(Nd)

Formula: NdCO₃(OH)
Crystal System: Orthorhombic
Crystal Habit: Microscopic Crystals
Luster: Vitreous - Dull
Color: pale pinkish purple, white
Class: Orthorhombic - Dipyramidal
Hardness: -

Collection: William & Anne Cook Collection

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

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