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Ore Minerals part 2

Monday, 07 August 2023 03:30 PM

Introducing the "Ore Minerals part 2" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including acanthite, alabandite, bornite, carnotite, columbite-(fe) and more from places like Bulldog mine, Creede dist., Mineral Co., Colorado, United States, Trench mine, Santa Cruz Co., Arizona, United States, Thunderbird mine, Ouray Co., Colorado, United States, Temple Mountain, Emery Co., Utah, United States, Etta mine, Pennington Co., South Dakota, United States, and Sodalite quarry, Bancroft, Canada.

SOLD

Acanthite

with Silver - #RW62068

Details
Data
Provenance
Resources

Locality: Bulldog mine, Creede dist., Mineral Co., Colorado, United States
Formula: Ag₂S
Availability: Sold
Size: 22 x 16.5 x 1 cm - Cabinet
Tagged: ore mineral , sulfide , silver

Slab of dark grey Acanthite, Pyrite, Baryte and minor Galena. A slab, such as this, is great for studying the paragenesis, relationships between all the minerals and identification to name a few.

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

Alabandite

#RW62247

Details
Data
Provenance
Resources

Locality: Trench mine, Santa Cruz Co., Arizona, United States
Formula: Mn²⁺S
Availability: Sold
Size: 7 x 4.5 x 4.5 cm - Sm Cabinet
Tagged: ore mineral

Dull black interlocking crystals of Alabandite, a manganese ore mineral.

Alabandite

Formula: Mn²⁺S
Crystal System: Isometric
Crystal Habit: Massive - Granular, Disseminated, Granular
Cleavage: Perfect, Perfect, Perfect
Luster: Sub Metallic
Color: black, lead gray, brownish gray
Streak: dark green
Class: Isometric - Hexoctahedral
Fracture: Uneven
Hardness: 3.5-4

Collection: Robert J. Waidler Collection

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

SOLD

Bornite

#AH59242

Details
Data
Provenance
Resources

Locality: Thunderbird mine, Ouray Co., Colorado, United States
Formula: Cu₅FeS₄
Availability: Sold
Size: 10 x 7 x 4 cm - Cabinet
Tagged: sulfide , copper , ore specimen

A solid chunk of Bornite exhibiting nice purple and blue iridescence. This is a mine hardly ever seen on the market.

Bornite

Formula: Cu₅FeS₄
Crystal System: Orthorhombic
Crystal Habit: Massive - Granular, Reniform, Granular
Cleavage: Imperfect, None, None
Luster: Metallic
Color: copper red, bronze brown, purple
Streak: grayish black
Class: Orthorhombic - Dipyramidal
Fracture: Conchoidal
Hardness: 3

Collection: Arnold G Hampson Collection

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

SOLD

Carnotite

#AH62252

Details
Data
Provenance
Resources

Locality: Temple Mountain, Emery Co., Utah, United States
Formula: K₂(UO₂)₂(VO₄)₂·3H₂O
Availability: Sold
Size: 9 x 6 x 5 cm - Sm Cabinet
Tagged: ore mineral
Special Info: Radioactive!!

Cabinet size chunk of nearly all Carnotite. It is vivid yellow.

Carnotite

Formula: K₂(UO₂)₂(VO₄)₂·3H₂O
Crystal System: Monoclinic
Crystal Habit: Earthy, Encrustations, Platy
Cleavage: Perfect, None, None
Luster: Pearly
Color: yellow, golden yellow, greenish yellow
Streak: light yellow
Class: Monoclinic - Prismatic
Fracture: Uneven
Hardness: 2

Collection: Arnold G Hampson Collection
Special Info: Radioactive!!

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

SOLD

Columbite-(Fe)

#56322

Details
Data
Provenance
Resources

Locality: Etta mine, Pennington Co., South Dakota, United States
Formula: Fe²⁺Nb₂O₆
Availability: Sold
Size: 7 x 5 x 2.3 cm - Sm Cabinet
Tagged: ore mineral , niobium

Basically a large "chunk" of Columbite from one of the most famous pegmatites in the world. The Etta mine produced lithium in the early years and eventually was known as a tin mine. Although it produced a little tin, it never survived as it was embroiled in one of the world's greatest mining scams.

The specimen has one good flat face and has a little white cleavandite attached from its former and typical matrix.