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Rare and Mixed Minerals

Friday, 13 June 2025 06:00 PM

Introducing the "Rare and Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including arsentsumebite, babanekite, beryl, calcioferrite, francevillite, and geocronite and more from places like Tsumeb mine, Tsumeb, Namibia, Geschieber vein, Rovnost mine, Jachymov, Karlovy, Czech Republic, Piracicaba mine, Minas Gerais, Brazil, Bruguers, Barcelona Province, Spain, Mounana mine, Franceville, Haut-Ogooué, Gabon, and Milpo mine, Atacocha dist., Cerro de Pasco, Pasco, Peru.

SOLD

Arsentsumebite - 65988

Arsentsumebite - 65988

Arsentsumebite

with Azurite - #65988

Details
Data
Provenance
Resources

Locality: Tsumeb mine, Tsumeb, Namibia
Formula: Pb₂Cu(AsO₄)(SO₄)(OH)
Availability: Sold
Size: 3 x 2.5 x 1.3 cm - Thumbnail
Tagged: arsenate , copper

Bright geen crystals of Arsentsumebite filling many vugs and associated with Azurite.

Arsentsumebite

Formula: Pb₂Cu(AsO₄)(SO₄)(OH)
Crystal System: Monoclinic
Cleavage: None, None, None
Luster: Adamantine - Metallic
Color: yellow green, emerald green
Streak: light green
Class: Monoclinic - Prismatic
Hardness: 4-5

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

SOLD

Babanekite - 65989

Babanekite - 65989

Babanekite

#65989

Details
Data
Provenance
Resources

Locality: Geschieber vein, Rovnost mine, Jachymov, Karlovy, Czech Republic
Formula: Cu₃(AsO₄)₂ · 8H₂O
Availability: Sold
Size: 2.5 x 2 x 1.5 cm - Thumbnail
Tagged: arsenate , copper
Special Info: Type Locality

Beautiful fuzzy balls composed of bladed pink of Babanekite crystals.

Babanekite

Special Info: Type Locality

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

Beryl - 66003

Beryl - 66003

Beryl

var. aquamarine - #66003

$35.00 - Available
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Details
Data
Provenance
Resources

Locality: Piracicaba mine, Minas Gerais, Brazil
Formula: Be₃Al₂Si₆O₁₈
Availability: Available
Price: $35.00
Size: 2.6 x 1 x 1 cm - Thumbnail
Tagged: beryllium , pegmatite mineral

A stubby light green terminated crystal.

Beryl

Formula: Be₃Al₂Si₆O₁₈
Crystal System: Hexagonal
Crystal Habit: Crystalline - Coarse, Prismatic, Columnar
Cleavage: Imperfect, None, None
Luster: Vitreous - Resinous
Color: green, blue, yellow, colorless, pink
Streak: white
Class: Hexagonal - Dihexagonal Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 7.5-8

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

Calcioferrite - 65985

Calcioferrite - 65985

Calcioferrite

#65985

$25.00 - Available
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Details
Data
Provenance
Resources

Locality: Bruguers, Barcelona Province, Spain
Formula: Ca₄MgFe³⁺₄(PO₄)₆(OH)₄·12H₂O
Availability: Available
Price: $25.00
Size: 2.2 x 2 x 1.5 cm - Thumbnail
Tagged: phosphate

Green crystalline areas.

Calcioferrite

Formula: Ca₄MgFe³⁺₄(PO₄)₆(OH)₄·12H₂O
Crystal System: Monoclinic
Crystal Habit: Foliated, Reniform
Cleavage: Perfect, Very Good, None
Luster: Pearly
Color: greenish yellow, yellow, yellow green, yellowish white
Streak: yellowish white
Class: Monoclinic - Sphenoidal
Fracture: Brittle
Hardness: 2.5

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

Francevillite - 65993

Francevillite - 65993

Francevillite

#65993

$40.00 - Available
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Details
Data
Provenance
Resources

Locality: Mounana mine, Franceville, Haut-Ogooué, Gabon
Formula: Ba(UO₂)₂(VO₄)₂·5H₂O
Availability: Available
Price: $40.00
Size: 2.2 x 3 x 1.2 cm - Thumbnail
Tagged: vanadium
Special Info: Radioactive!!
Special Info: Type Locality

Lemon yellow plates spread across matrix.

Francevillite

Formula: Ba(UO₂)₂(VO₄)₂·5H₂O
Crystal System: Orthorhombic
Cleavage: Perfect, None, None
Luster: Adamantine - Pearly
Color: brownish yellow, yellow, yellow green
Streak: light yellow
Class: Orthorhombic - Dipyramidal
Hardness: 3

Special Info: Radioactive!!
Special Info: Type Locality

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

Geocronite - 65982

Geocronite - 65982

Geocronite

with Fluorite - #65982

$95.00 - Available
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Details
Data
Provenance
Resources

Locality: Milpo mine, Atacocha dist., Cerro de Pasco, Pasco, Peru
Formula: Pb₁₄(Sb,As)₆S₂₃
Availability: Available
Price: $95.00
Size: 3 x 2.5 x 1 cm - Thumbnail
Tagged: sulfide
Special Info: XRD Confirmed
Special Info: EDS Confirmed

Outstanding crystals of Geocronite to 1mm crowning bright green Fluorite.

Geocronite

Formula: Pb₁₄(Sb,As)₆S₂₃
Crystal System: Monoclinic
Crystal Habit: Massive - Granular
Cleavage: Distinct, None, None
Luster: Metallic
Color: blue gray, gray, silver white
Streak: lead gray
Class: Monoclinic - Prismatic
Fracture: Uneven
Hardness: 2.5-3

Special Info: XRD Confirmed
Special Info: EDS Confirmed

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

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