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Rare Minerals

Thursday, 08 May 2025 06:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including eudialyte, famatinite, fluorcarletonite, gold, and gratonite and more from places like Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada, Chinkuashih mine, Ruifang dist., New Taipei City, Taiwan, Severny area, Malyi Murun Massif, Irkutsk Oblast, Russia, Shinkolobwe, Katanga, Democratic Republic of Congo, Fire Creek mine, Lander Co., Nevada, United States, and Excelsior mine, Cerro de Pasco, Pasco dept., Peru.

SOLD

Eudialyte

#65835

Details
Data
Provenance
Resources

Locality: Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada
Formula: Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂
Availability: Sold
Size: 5 x 3.5 x 2 cm - Miniature

Superb and stunning cherry red Eudialyte crystals to 1.5mm in large 3cm vug.

Eudialyte

Formula: Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂
Crystal System: Trigonal
Crystal Habit: Massive - Granular, Tabular
Cleavage: Imperfect, None, None
Luster: Vitreous (Glassy)
Color: pinkish red, red, yellow, yellowish brown, violet
Streak: white
Class: Trigonal - Hexagonal Scalenohedral
Fracture: Uneven
Hardness: 5-5.5

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

SOLD

Famatinite

with Pyrite - #65844

Details
Data
Provenance
Resources

Locality: Chinkuashih mine, Ruifang dist., New Taipei City, Taiwan
Formula: Cu₃SbS₄
Availability: Sold
Size: 1.5 x 1.5 x 1 cm - Thumbnail
Tagged: sulfide , copper

Crystalline black and shiny mass. It is sawed on one side indicating it was tested.

Famatinite

Formula: Cu₃SbS₄
Crystal System: Tetragonal
Cleavage: Good, Distinct, None
Luster: Metallic
Color: grayish black, dark pink brown, steel gray
Streak: black
Class: Tetragonal - Scalenohedral
Fracture: Brittle - Conchoidal
Hardness: 3-4

On Dakota Matrix: Previously Sold Famatinite
On Dakota Matrix: Other Available Famatinite
WebMineral: View Famatinite
Mindat: View Famatinite

SOLD

Fluorcarletonite

with Frankamenite and Charoite - #65826

Details
Provenance
Resources

Locality: Severny area, Malyi Murun Massif, Irkutsk Oblast, Russia
Formula: KNa₄Ca₄Si₈O₁₈(CO₃)₄F · H₂O
Availability: Sold
Size: 2.5 x 2 x 1.3 cm - Thumbnail
Tagged: carbonate
Special Info: Type Locality

A relatively new mineral, Fluorcarltonite is the F-dominant analogue of Carletonite. It is a blue phyllosilicate and on in this specimen it occurs in a very distinct pod measuring 12x8mm. It oocurs with purple Charoite, back Aegerine and yellowish green Frankamenite. This specimen has been cut on all sides, except for one, and was used for analytical data. Excellent specimen, probably one of the best out there.