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Mixed Minerals

Friday, 13 March 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including argentopyrite, arthurite, cassiterite, cupromolybdite, tetrahedrite, and tiragalloite and more from places like Jachymov, Erzgegirge, Bohemia, Czech Republic, Hingston Down quarry, Gunnislake, Cornwall, England, Poldory Sett, United Downs, St. Day, Cornwall, England, Tolbachik Volcano, Kamchatka, Russia, Herodsfoot mine, Liskeard, Cornwall, England, and Cassagna Mine, Graveglia Valley, Ne, Genova Province, Liguria, Italy.

Argentopyrite

#52367

$30.00 - Available
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Locality: Jachymov, Erzgegirge, Bohemia, Czech Republic
Formula: AgFe₂S₃
Availability: Available
Price: $30.00
Size: 3 x 2 x 1 cm - Thumbnail
Tagged: sulfide , silver

Very tiny formless grains of Argentopyrite.

Argentopyrite

Formula: AgFe₂S₃
Crystal System: Orthorhombic
Cleavage: None, None, None
Luster: Metallic
Color: blue, bronze brown, green, yellow, white
Class: Orthorhombic - Dipyramidal
Fracture: Brittle - Uneven
Hardness: 3.5-4

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

Arthurite

#52471

$60.00 - Available
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Locality: Hingston Down quarry, Gunnislake, Cornwall, England
Formula: CuFe³⁺₂(AsO₄)₂(OH)₂·4H₂O
Availability: Available
Price: $60.00
Size: 7 x 6.5 x 1.5 cm - Sm Cabinet
Tagged: arsenate , copper
Special Info: Type Locality

Green coatings and micro crystals less than 0.75mm. Some areas contain good well-defined crystals whereas other areas are crystals which have all merged together forming a crust. This is the type locality.

Arthurite

Formula: CuFe³⁺₂(AsO₄)₂(OH)₂·4H₂O
Crystal System: Monoclinic
Crystal Habit: Prismatic, Acicular, Spherical
Cleavage: None, None, None
Luster: Vitreous (Glassy)
Color: apple green, emerald green
Streak: light green
Class: Monoclinic - Prismatic
Fracture: Brittle
Hardness: 3-4

Special Info: Type Locality

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

Cassiterite

#52440

$150.00 - Available
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Locality: Poldory Sett, United Downs, St. Day, Cornwall, England
Formula: SnO₂
Availability: Available
Price: $150.00
Size: 7 x 5.5 x 5.5 cm - Sm Cabinet
Tagged: tin

Exceptionally well formed glassy brown crystals of Cassiterite to 2mm.

Cassiterite

Formula: SnO₂
Crystal System: Tetragonal
Crystal Habit: Prismatic, Massive, Botryoidal
Cleavage: Perfect, Indistinct, None
Luster: Adamantine
Color: brown, brownish black, colorless, green, gray
Streak: brownish white
Class: Tetragonal - Ditetragonal Dipyramidal
Fracture: Irregular
Hardness: 6-7

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

Cupromolybdite

#52393

$95.00 - Available
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Locality: Tolbachik Volcano, Kamchatka, Russia
Formula: Cu₃O(MoO₄)₂
Availability: Available
Price: $95.00
Size: 1 x 1 x 1 cm - Thumbnail
Tagged: copper
Special Info: XRD Confirmed
Special Info: EDS Confirmed
Special Info: Type & Only Locality
Special Info: Author's Material

Red elongated octahedral micro crystals less than 0.5mm. This is a specimen studied by the author Dr. Igor Pekov.

Cupromolybdite

Special Info: XRD Confirmed
Special Info: EDS Confirmed
Special Info: Type & Only Locality
Special Info: Author's Material

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

Tetrahedrite

#52458

$35.00 - Available
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Locality: Herodsfoot mine, Liskeard, Cornwall, England
Formula: Cu₁₂Sb₄S₁₃
Availability: Available
Price: $35.00
Size: 4 x 3.5 x 3 cm - Miniature
Tagged: sulfide , copper

4mm Tetrahedrite crystals probably coated with Chalcopyrite.

Tetrahedrite

Formula: Cu₁₂Sb₄S₁₃
Crystal System: Isometric
Crystal Habit: Massive - Granular, Massive
Cleavage: None, None, None
Luster: Metallic
Color: iron gray, black, steel gray
Streak: black
Class: Isometric - Hextetrahedral
Fracture: Uneven
Hardness: 3.5-4

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

Tiragalloite

#52766

$65.00 - Available
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Locality: Cassagna Mine, Graveglia Valley, Ne, Genova Province, Liguria, Italy
Formula: Mn²⁺₄As⁵⁺Si₃O₁₂(OH)
Availability: Available
Price: $65.00
Size: 4 x 2.5 x 2.5 cm - Miniature

Bright orange compact fibrous crystals in thin 3mm seam.

Tiragalloite

Formula: Mn²⁺₄As⁵⁺Si₃O₁₂(OH)
Crystal System: Monoclinic
Crystal Habit: Prismatic, Acicular
Cleavage: Good, Parting, None
Luster: Subadamantine
Color: orange
Streak: white
Class: Monoclinic - Prismatic
Hardness: -

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

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