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Rare Minerals

Saturday, 31 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 acanthite, antofagastaite, behoite, brandaoite, chiolite, and clinochlore and more from places like Vojtěch mine, Příbram, Bohemia, Czech Republic, Coronel Manuel Rodríguez mine, Mejillones, Antofagasta, Chile, Johs Nilsens quarry, Larvik, Vestfold, Norway, João Firmino claim, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil, Amelia, Virginia, United States, and Kop Krom mine, Kop Daglari, Erzurum, Eastern Anatolia, Turkey.

Acanthite - 65546

Acanthite - 65546

Acanthite

#65546

$295.00 - Available
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Provenance
Resources

Locality: Vojtěch mine, Příbram, Bohemia, Czech Republic
Formula: Ag₂S
Availability: Available
Price: $295.00
Size: 6 x 4 x 3 cm - Sm Cabinet
Tagged: sulfide , silver

Old time specimen from a classic and historic locality. There is a large protrusion of Acanthite crystals that measures 2.5 x 1.5cm filled with several distorted cubic crystals to around 3.5mm.

Acanthite

Formula: Ag₂S
Crystal System: Monoclinic
Crystal Habit: Blocky, Skeletal, Arborescent
Cleavage: poor to none
Luster: Metallic
Color: lead gray, gray, iron black
Streak: shining black
Class: Monoclinic - Prismatic
Fracture: Sectile
Hardness: 2-2.5

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

SOLD

Antofagastaite - 65565

Antofagastaite - 65565

Antofagastaite

with Sideronatrite - #65565

Details
Provenance
Resources

Locality: Coronel Manuel Rodríguez mine, Mejillones, Antofagasta, Chile
Formula: Na₂Ca(SO₄)₂ · 1.5H₂O
Availability: Sold
Size: 2 x 2 x 1.5 cm - Thumbnail
Special Info: Type Locality

Rich specimen with 0.5 to 1mm white to colorless crystals of Antofagastaite with orange crystals of Sideronatrite. There is alot more Antofagastaite than the photos depict. The orange Sideronatrite floods out the white colorless Antofagstaite.

Special Info: Type Locality

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

SOLD

Behoite - 65482

Behoite - 65482

Behoite

on Natrolite - #65482

Details
Data
Provenance
Resources

Locality: Johs Nilsens quarry, Larvik, Vestfold, Norway
Formula: Be(OH)₂
Availability: Sold
Size: 3 x 2.5 x 2.5 cm - Thumbnail
Tagged: beryllium

An interesting piece with colorless crystals grown on terminations of Natrolite.

Behoite

Formula: Be(OH)₂
Crystal System: Orthorhombic
Cleavage: None, None, None
Luster: Vitreous (Glassy)
Color: colorless, white, pale brown
Streak: white
Class: Orthorhombic - Disphenoidal
Hardness: 4

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

SOLD

Brandaoite - 65695

Brandaoite - 65695

Brandaoite

#65695

Details
Data
Provenance
Resources

Locality: João Firmino claim, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil
Formula: BeAl₂(PO₄)₂(OH)₂(H₂O)₅
Availability: Sold
Size: 2.5 x 2 x 1.3 cm - Thumbnail
Tagged: phosphate , beryllium , pegmatite mineral
Special Info: Type & Only Locality

A relatively new mineral called Brandaoite which consist of snow-white acicular crystals. It is a rare beryllophosphate.

Brandaoite

Formula: BeAl₂(PO₄)₂(OH)₂(H₂O)₅

Special Info: Type & Only Locality

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

SOLD

Chiolite - BAC65915

Chiolite - BAC65915

Chiolite

with Thomsenolite - #BAC65915

Details
Data
Provenance
Resources

Locality: Amelia, Virginia, United States
Formula: Na₅Al₃F₁₄
Availability: Sold
Size: 1 x 1 x 0.8 cm - Thumbnail

Tiny colorless crystals of Chiolite shaped like a fishtail. It is a fine piece for this rare mineral with a lot of crystals.

Chiolite

Formula: Na₅Al₃F₁₄
Crystal System: Tetragonal
Crystal Habit: Crystalline - Fine
Cleavage: Perfect, Distinct, None
Luster: Vitreous - Greasy
Color: colorless, snow white
Streak: white
Class: Tetragonal - Ditetragonal Dipyramidal
Hardness: 3.5-4

Collection: William & Anne Cook Collection

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

SOLD

Clinochlore - 65423

Clinochlore - 65423

Clinochlore

(chromian) - #65423

Details
Data
Provenance
Resources

Locality: Kop Krom mine, Kop Daglari, Erzurum, Eastern Anatolia, Turkey
Formula: Mg₆Si₄O₁₀(OH)₈
Availability: Sold
Size: 6.5 x 5 x 6 cm - Sm Cabinet

Beautiful or stunning specimen with individual crystals averaging 3mm.

Clinochlore

Formula: Mg₆Si₄O₁₀(OH)₈
Crystal System: Monoclinic
Crystal Habit: Massive - Fibrous, Pseudo Hexagonal, Granular
Cleavage: Perfect, None, None
Luster: Vitreous - Pearly
Color: blackish green, bluish green, white, yellowish green, olive green
Streak: white
Class: Monoclinic - Prismatic
Fracture: Uneven
Hardness: 2-2.5

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

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