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Rare Minerals

Friday, 07 March 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 brandaoite, carminite, chalcopyrite, chloroxiphite, copper and more from places like João Firmino claim, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil, Centennial Eureka mine, Tintic dist., Juab Co., Utah, United States, Herodsfoot mine, Liskeard, Cornwall, England, Torr Works quarry, Cranmore, Somerset, England, Cole Shaft, Bisbee, Cochise Co., Arizona, United States, and Rudabánya, Hungary.

SOLD

Brandaoite

#65690

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Provenance
Resources

Locality: João Firmino claim, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil
Formula: BeAl₂(PO₄)₂(OH)₂(H₂O)₅
Availability: Sold
Size: 2 x 1.5 x 1.8 cm - Thumbnail
Tagged: phosphate , beryllium , pegmatite mineral
Special Info: Type Locality
Special Info: XRD Confirmed
Special Info: EDS Confirmed

Brandaoite is a new beryllium - aluminum phosphate published in 2019. On this specimen are fuzzy white sprays to 2mm. There are three groups as seen.

Special Info: Type Locality
Special Info: XRD Confirmed
Special Info: EDS Confirmed

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

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Carminite

#65531

Details
Data
Provenance
Resources

Locality: Centennial Eureka mine, Tintic dist., Juab Co., Utah, United States
Formula: PbFe³⁺₂(AsO₄)₂(OH)₂
Availability: Sold
Size: 4.5 x 2 x 2 cm - Miniature
Tagged: arsenate

Deep red acicular crystals.

Carminite

Formula: PbFe³⁺₂(AsO₄)₂(OH)₂
Crystal System: Orthorhombic
Crystal Habit: Lath, Acicular
Cleavage: Distinct, None, None
Luster: Vitreous - Pearly
Color: carmine red, reddish brown
Streak: reddish yellow
Class: Orthorhombic - Dipyramidal
Fracture: Brittle
Hardness: 3.5

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

Chalcopyrite

on Tetrahedrite - #65516

$650.00 - Available
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Locality: Herodsfoot mine, Liskeard, Cornwall, England
Formula: Cu¹⁺Fe³⁺S₂
Availability: Available
Price: $650.00
Size: 8 x 4.5 x 5 cm - Sm Cabinet
Tagged: sulfide , copper

This is an old-timer specimen highly sought after locality, which has produced such nice specimens as this one. Chalcopyrite has coated or overgrown Tetrahedrite crystals which measure up to 7mm.

Chalcopyrite

Formula: Cu¹⁺Fe³⁺S₂
Crystal System: Tetragonal
Crystal Habit: Euhedral Crystals, Striated, Druse
Cleavage: Indistinct, None, None
Luster: Metallic
Color: brass yellow, honey yellow
Streak: greenish black
Class: Tetragonal - Scalenohedral
Fracture: Brittle
Hardness: 3.5

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

SOLD

Chloroxiphite

in Mendipite - #65698

Details
Data
Provenance
Resources

Locality: Torr Works quarry, Cranmore, Somerset, England
Formula: Pb₃CuO₂Cl₂(OH)₂
Availability: Sold
Size: 3.5 x 1.9 x 1.2 cm - Miniature
Tagged: copper

Lengthy green Chloroxiphite measuring 1.5cm in pink Mendipite. The blue mineral in the Chloroxiphite is Diaboleite. I'm not sure what the yellow is, perhaps Paralaurionite.

Chloroxiphite

Formula: Pb₃CuO₂Cl₂(OH)₂
Crystal System: Monoclinic
Crystal Habit: Tabular
Cleavage: Perfect, Distinct, None
Luster: Adamantine - Resinous
Color: dull olive green, pistachio green
Streak: light yellow green
Class: Monoclinic - Prismatic
Fracture: Brittle
Hardness: 2.5

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

Copper

#65515

$750.00 - Available
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Locality: Cole Shaft, Bisbee, Cochise Co., Arizona, United States
Formula: Cu
Availability: Available
Price: $750.00
Size: 5 x 4 x 3.5 cm - Miniature
Tagged: native element

Arborescent Copper crystals, some with possible Silver crystals perched nicely on Calcite with included Copper. This is substantial specimen from Bisbee, Arizona. It is most likely an old-timer mined many decades ago.