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Rare Minerals

Wednesday, 01 January 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 emmonsite, erythrite, fairfieldite, fluorapatite, fluorapophyllite-(k), and franckeite and more from places like Moctezuma mine, Moctezuma, Sonora, Mexico, Bou Azzer dist., Anti-Atlas, Morocco, Foote mine, Cleveland Co., North Carolina, United States, King Lithia mine, Pennington Co., South Dakota, United States, Jalgaon dist., Maharashtra, India, and Pirquitas Ag-Sn Deposit, Rinconada Dept., Jujuy, Argentina.

SOLD

Emmonsite - JD65216

Emmonsite - JD65216

Emmonsite

#JD65216

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Provenance
Resources

Locality: Moctezuma mine, Moctezuma, Sonora, Mexico
Formula: Fe³⁺₂(Te⁴⁺O₃)₃·2H₂O
Availability: Sold
Size: 7.5 x 5 x 2.5 cm - Sm Cabinet
Tagged: tellurium

Green, branching Emmonsite to 2-3mm.

Emmonsite

Formula: Fe³⁺₂(Te⁴⁺O₃)₃·2H₂O
Crystal System: Triclinic
Crystal Habit: Mammillary
Cleavage: Perfect, None, None
Luster: Vitreous - Dull
Color: yellow, greenish yellow
Class: Triclinic - Pinacoidal
Hardness: 2-2.5

Collection: John Dagenais Collection

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

Erythrite - JD65241

Erythrite - JD65241

Erythrite

#JD65241

$95.00 - Available
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Locality: Bou Azzer dist., Anti-Atlas, Morocco
Formula: Co₃(AsO₄)₂·8H₂O
Availability: Available
Price: $95.00
Size: 4.5 x 2.5 x 2.5 cm - Miniature
Tagged: arsenate

Excellent rich specimen with radial sprays of Erythrite with bladed crystals of, also, Erythrite. This specimen is absolutely gorgeous under the scope.

Erythrite

Formula: Co₃(AsO₄)₂·8H₂O
Crystal System: Monoclinic
Crystal Habit: Striated, Prismatic, Divergent
Cleavage: Perfect, None, None
Luster: Pearly
Color: colorless, violet red, light pink, purple red
Streak: pinkish red
Class: Monoclinic - Prismatic
Fracture: Sectile
Hardness: 1.5-2

Collection: John Dagenais Collection

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

SOLD

Fairfieldite - 65197

Fairfieldite - 65197

Fairfieldite

#65197

Details
Data
Provenance
Resources

Locality: Foote mine, Cleveland Co., North Carolina, United States
Formula: Ca₂Mn²⁺(PO₄)₂·2H₂O
Availability: Sold
Size: 2.2 x 1.8 x 1.7 cm - Thumbnail
Tagged: phosphate , pegmatite mineral

Very tiny, less than 0.75mm, rosettes of Fairfieldite on Quartz crystals.

Fairfieldite

Formula: Ca₂Mn²⁺(PO₄)₂·2H₂O
Crystal System: Triclinic
Crystal Habit: Foliated, Fibrous, Euhedral Crystals
Cleavage: Perfect, Distinct, None
Luster: Vitreous - Pearly
Color: greenish white, white, light yellow
Streak: white
Class: Triclinic - Pinacoidal
Fracture: Brittle - Uneven
Hardness: 3.5

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

SOLD

Fluorapatite - 65234

Fluorapatite - 65234

Fluorapatite

#65234

Details
Data
Provenance
Resources

Locality: King Lithia mine, Pennington Co., South Dakota, United States
Formula: Ca₅(PO₄)₃F
Availability: Sold
Size: 9 x 5 x 5 cm - Sm Cabinet
Tagged: phosphate , pegmatite mineral

A large pocket filled with Quartz and purple Fluorapatite crystals. The Fluorapatite is very nice for the locality with crystals to 7mm.

Fluorapatite

Formula: Ca₅(PO₄)₃F
Crystal System: Hexagonal
Crystal Habit: Massive - Granular, Euhedral Crystals
Cleavage: Indistinct, None, None
Luster: Vitreous - Resinous
Color: blue, brown, colorless, violet, green
Streak: white
Class: Hexagonal - Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 5

Collection: Don Owens Collection

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

Fluorapophyllite-(K) - BN65232

Fluorapophyllite-(K) - BN65232

Fluorapophyllite-(K)

#BN65232

$495.00 - Available
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Resources

Locality: Jalgaon dist., Maharashtra, India
Formula: KCa₄Si₈O₂₀F·8H₂O
Availability: Available
Price: $495.00
Size: 4.5 x 4 x 4 cm - Miniature

Stunning group of Fluorapophyllite with a Stilbite base. Any angle of this specimen is just perfect. The color in the photos is more-or-less correct.

Fluorapophyllite-(K)

Collection: Dr. Buford Nichols Collection

Mineralpedia: View Fluorapophyllite-(K)
On Dakota Matrix: Previously Sold Fluorapophyllite-(K)
On Dakota Matrix: Other Available Fluorapophyllite-(K)
WebMineral: View Fluorapophyllite-(K)
Mindat: View Fluorapophyllite-(K)

Franckeite - BAC65187

Franckeite - BAC65187

Franckeite

(arsenian) - #BAC65187

$35.00 - Available
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Locality: Pirquitas Ag-Sn Deposit, Rinconada Dept., Jujuy, Argentina
Formula: Fe²⁺(Pb,Sn²⁺)₆Sn⁴⁺₂Sb³⁺₂S₁₄
Availability: Available
Price: $35.00
Size: 2.2 x 1 x 0.8 cm - Thumbnail
Tagged: sulfide , tin

Very fine granular Franckeite.

Franckeite

Formula: Fe²⁺(Pb,Sn²⁺)₆Sn⁴⁺₂Sb³⁺₂S₁₄
Crystal System: Triclinic
Crystal Habit: Tabular, Massive - Fibrous, Radial
Cleavage: Perfect, None, None
Luster: Metallic
Color: grayish black, blackish gray
Streak: grayish black
Class: Triclinic - Pinacoidal
Fracture: Flexible
Hardness: 2.5

Collection: William & Anne Cook Collection

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

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