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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 hunchunite, iranite, kaznakhtite, lemoynite, libethenite, and lithiophilite and more from places like Tagil River, Ural, Russia, Chah-Khouni mine, Anarak dist, Esfahan, Iran, Kaznakhtinskiy ultrabasic massif, Terekta Ridge, Altai Mts., Russia, Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada, Miguel Vacas mine, Vila Vecosa, Portugal, and Newry Mica mine, Oxford Co., Maine, United States.

Hunchunite

with Gold - #65824

$225.00 - Available
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Locality: Tagil River, Ural, Russia
Formula: Au₂Pb
Availability: Available
Price: $225.00
Size: 1 x 1.2 x 0.5 cm - Thumbnail
Tagged: silver
Special Info: XRD Confirmed
Special Info: EDS Confirmed
Special Info: ID by Polished Section

Thi is an old polished section from Prof. Nikolay Rudashevskiy, the late Russian mineralogist, who described and authored numerous new minerals. This polished section was obviously a microprobed analytical specimen to describe this particular locality.

Please see the provenance tab to view all the analytical data from Nikolay Rudashevskiy.

Hunchunite

Formula: Au₂Pb
Crystal System: Isometric
Luster: Metallic
Color: lead gray, silver gray
Class: Isometric - Hexoctahedral
Hardness: 3.5

Special Info: XRD Confirmed
Special Info: EDS Confirmed
Special Info: ID by Polished Section

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

SOLD

Iranite

#65869

Details
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Provenance
Resources

Locality: Chah-Khouni mine, Anarak dist, Esfahan, Iran
Formula: CuPb₁₀(CrO₄)₆(SiO₄)₂(OH)₂
Availability: Sold
Size: 2 x 1.5 x 1.2 cm - Thumbnail
Tagged: copper

Chocolate brown, lustrous mincrocrystals to about 0.75mm.

Iranite

Formula: CuPb₁₀(CrO₄)₆(SiO₄)₂(OH)₂
Crystal System: Triclinic
Luster: Vitreous (Glassy)
Color: brownish yellow, yellow, honey brown
Streak: yellow
Class: Triclinic - Pedial
Hardness: 3

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

SOLD

Kaznakhtite

in Stichtite - #65825

Details
Data
Provenance
Resources

Locality: Kaznakhtinskiy ultrabasic massif, Terekta Ridge, Altai Mts., Russia
Formula: Ni₆Co₂(CO₃)(OH)₁₆ - 4H₂O
Availability: Sold
Size: 9 x 5 x 3.5 cm - Sm Cabinet
Tagged: carbonate , nickel
Special Info: Type Locality

Kaznakhtite is a relatively new mineral designated by the IMA as No. 2021-056. On this specimen there are two deep green large crystals, 3mm and 2mm, in size in purple Stitchite. I am told this was a very limited find and thus very rare.

Kaznakhtite is a member of the Hydrotalcite supergroup and thus will be associated with similar species such as its matrix (Stitchite), Iowaite, Pyroaurite and Woodalite. These are hydroxides and carbonates of magnesium and iron some of which contain chromium and nickel, such as Kaznakhtite. The locality is Kaznakhtinskiy ultrabasic massif which is metamorphosed to serpentinites.

The mineral was described by my friend Anatoly Kasatkin et al and published in the Mineralogical Magazine July 2022:

Kaznakhtite, Ni6Co3+2(CO3)(OH)16⋅4H2O, a new natural layered double hydroxide, the member of the hydrotalcite supergroup

Kaznakhtite

Special Info: Type Locality

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

SOLD

Lemoynite

#65868

Details
Data
Provenance
Resources

Locality: Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada
Formula: Na₂CaZr₂Si₁₀O₂₆·5-6H₂O
Availability: Sold
Size: 7 x 4 x 3 cm - Sm Cabinet
Special Info: Type Locality

Radiating colorless crystals to 5mm. Lemoynite has been found at only three worldwide localities.

Lemoynite

Formula: Na₂CaZr₂Si₁₀O₂₆·5-6H₂O
Crystal System: Monoclinic
Crystal Habit: Bladed, Prismatic, Wheat Sheaf
Cleavage: Perfect, Perfect, Imperfect
Luster: Vitreous (Glassy)
Color: yellowish white, light blue
Streak: white
Class: Monoclinic - Prismatic
Fracture: Brittle
Hardness: 4

Special Info: Type Locality

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

Libethenite

#65815

$35.00 - Available
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Provenance
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Locality: Miguel Vacas mine, Vila Vecosa, Portugal
Formula: Cu₂PO₄(OH)
Availability: Available
Price: $35.00
Size: 3 x 3 x 2 cm - Thumbnail
Tagged: phosphate , copper

Green micro crystals, less than 0.5mm, with triangular faces.

Libethenite

Formula: Cu₂PO₄(OH)
Crystal System: Orthorhombic
Crystal Habit: Prismatic, Druse, Globular
Cleavage: Indistinct, Indistinct, None
Luster: Vitreous - Greasy
Color: green, dark green, blackish green, light olive green, dark olive green
Streak: light green
Class: Orthorhombic - Dipyramidal
Fracture: Brittle
Hardness: 4