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Rare Earth Minerals

Tuesday, 19 April 2022 02:30 PM

Introducing the "Rare Earth Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including melanocerite-(ce), monazite-(ce), parisite-(ce), perrierite-(ce), perrierite-(la), and rhabdophane-(ce) and more from places like Cardiff Uranium mine, Haliburton Co., Ontario, Canada, Jakkalswater, Steinkopf, Northern Cape, South Africa, Snowbird mine, Lola Pass, Mineral Co., Montana, United States, Burley Farm, near Amherst, Nelson Co., Virginia, United States, Buer, Bjørkedalen, Porsgrunn, Telemark, Norway, and Mt. Karnasurt, Lovozero Massif, Kola Peninsula, Russia.

SOLD

Melanocerite-(Ce)

#BW58024

Details
Data
Provenance
Resources

Locality: Cardiff Uranium mine, Haliburton Co., Ontario, Canada
Formula: (Ce,Ca)₅(SiO₄,BO4)₃(OH,0)
Availability: Sold
Size: 6 x 2 x 2 cm - Sm Cabinet
Tagged: REE mineral

Black to brown greasy looking crystal grains to 1cm. Melanocerite contains the REE cerium used in oil cracking during petroleum refining and used as a yellow coloring agent in ceramic and glass.

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: Bill Wilson Collection

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

SOLD

Monazite-(Ce)

#BW58043

Details
Data
Provenance
Resources

Locality: Jakkalswater, Steinkopf, Northern Cape, South Africa
Formula: CePO₄
Availability: Sold
Size: 4 x 2.5 x 1 cm - Miniature
Tagged: phosphate , REE mineral , pegmatite mineral
Special Info: Radioactive!!

Monazite is a rare earth mineral and may also contain uranium, tantalum and titanium. This locality is a NYF (niobium-yttrium-fluorine) pegmatite, which can contain many rare earth minerals. Monazite may contain other REE's such as lanthanum, yttrium aside from thorium.

Monazite-(Ce)

Formula: CePO₄
Crystal System: Monoclinic
Crystal Habit: Crystalline - Fine, Twinning Common
Cleavage: Distinct, Indistinct, None
Luster: Adamantine - Resinous
Color: brown, colorless, greenish, gray white, yellow
Streak: grayish white
Class: Monoclinic - Prismatic
Fracture: Conchoidal
Hardness: 5-5.5

Collection: Bill Wilson Collection
Special Info: Radioactive!!

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

SOLD

Parisite-(Ce)

#BW58036

Details
Data
Provenance
Resources

Locality: Snowbird mine, Lola Pass, Mineral Co., Montana, United States
Formula: CaCe₂(CO₃)₃F₂
Availability: Sold
Size: 4 x 1.5 x 2 cm - Miniature
Tagged: carbonate , REE mineral

Reddish brown large crystal shaped like a tornado.

Parisite-(Ce)

Formula: CaCe₂(CO₃)₃F₂
Crystal System: Trigonal
Crystal Habit: Acicular, Striated, Prismatic
Cleavage: Distinct, None, None
Luster: Vitreous - Greasy
Color: brown, brownish yellow, grayish yellow, yellow
Streak: white
Class: Trigonal - Pyramidal
Fracture: Brittle
Hardness: 4.5

Collection: Bill Wilson Collection

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

SOLD

Perrierite-(Ce)

#BW58023

Details
Data
Provenance
Resources

Locality: Burley Farm, near Amherst, Nelson Co., Virginia, United States
Formula: Ce₄MgFe³⁺₂Ti⁴⁺₂O₈(Si₂O₇)₂
Availability: Sold
Size: 4.5 x 2.5 x 1.5 cm - Miniature

Heavy black massive specimen containing the rare earth element cerium. Perrierite is usually metamict

Cerium is used in the manufacture of battery alloys, metal alloys, catalysts in autos, and glass additives to name a few. From the 1950's to the 2000's it was used in lapidary polishing agents. Price increases eliminated the use. Aluminum and titanium oxides are now used.

Best ref.: Arthur A. Pegau (1932) Pegmatite Deposits of Virginia. Virginia Geological Survey; Bulletin 33.

Perrierite-(Ce)

Formula: Ce₄MgFe³⁺₂Ti⁴⁺₂O₈(Si₂O₇)₂
Crystal System: Monoclinic
Crystal Habit: Metamict, Prismatic, Massive
Luster: Resinous
Color: black, brownish, dark reddish brown
Streak: brown
Class: Monoclinic - Prismatic
Fracture: Conchoidal - Uneven
Hardness: 5.5

Collection: Bill Wilson Collection

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

SOLD

Perrierite-(La)

#BW58046

Details
Provenance
Resources

Locality: Buer, Bjørkedalen, Porsgrunn, Telemark, Norway
Formula: (La,Ce,Ca)₄(Fe²⁺,Mn)(Ti,Fe³⁺,Al)₄(Si₂O₇)₂O₈
Availability: Sold
Size: 4 x 3.5 x 2.5 cm - Miniature
Tagged: REE mineral
Special Info: Type Locality

This is the type locality for this rare earth mineral. It is one of three localities worldwide. The Perrierite is lanthanum bearing and can be seen on this specimen as black crystal grains to 1mm. It is associated with Microcline, Zircon, and garnet. The host rock is a syenite defined as a magmatic deposit containing less than 5% Quartz and is peralkaline (rich in K, poor in Ca).

Lanthanum was discovered in 1839 by the Swedish chemist, Carl Gustav Mosander. It is used for specialy glass, lighting, and hybrid car batteries.