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Ore Minerals

Wednesday, 29 June 2022 08:00 AM

Introducing the "Ore Minerals" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including lepidolite, miargyrite, molybdenite, pyrargyrite, pyrrhotite, and scheelite and more from places like Harding mine, Taos Co., New Mexico, United States, Kelly mine, Randsburg dist., San Bernardino Co., California, Swede mine, Pinal Co., Arizona, United States, Colquechaca, Potosi dept., Bolivia, Homestake mine, Lawrence Co., South Dakota, United States, and Jardine mine, Park Co., Montana, United States.

SOLD

Lepidolite

with Microlite & Spodumene - lithium ore - #AH58548

Details
Data
Provenance
Resources

Locality: Harding mine, Taos Co., New Mexico, United States
Formula: K(Li,Al)₃(Si,Al)₄O₁₀(F,OH)₂
Availability: Sold
Size: 14 x 13 x 7 cm - Cabinet
Tagged: ore mineral , pegmatite mineral

A beautiful specimen of purple Lepidolite associated with white Spodumene crystals collected in 1961 by Arnold Hampson. Both minerals are primary ores of lithium. The spodumene on the specimen measures up to 6cm. Here and there on the specimen yellowish brown Microlite crystals to 3mm can be seen.

Lepidolite

Formula: K(Li,Al)3(Si,Al)4O10(F,OH)2
Crystal System: Monoclinic
Crystal Habit: Platy, Foliated, Massive
Cleavage: Perfect, None, None
Luster: Vitreous - Pearly
Color: colorless, gray white, lilac, yellowish, white
Streak: white
Class: Monoclinic
Fracture: Uneven
Hardness: 2.5-3

Collection: Arnold G Hampson Collection

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

SOLD

Miargyrite

- silver ore - #58543

Details
Data
Provenance
Resources

Locality: Kelly mine, Randsburg dist., San Bernardino Co., California
Formula: AgSbS₂
Availability: Sold
Size: 13 x 7.5 x 6 cm - Cabinet
Tagged: sulfide , ore specimen , silver

Large silvery mass of nearly all Miargyrite, an ore of Silver. The specimen is a deaccession from Cal Tech. You will never see another large mass of Miargyrite like again.

Miargyrite

Formula: AgSbS₂
Crystal System: Monoclinic
Crystal Habit: Euhedral Crystals, Disseminated, Massive
Cleavage: Imperfect, None, None
Luster: Sub Metallic
Color: steel gray, lead gray, blackish red, reddish gray
Streak: cherry red
Class: Monoclinic - Prismatic
Fracture: Brittle
Hardness: 2-2.5

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

SOLD

Molybdenite

- molybdenum ore - #AH56989

Details
Data
Provenance
Resources

Locality: Swede mine, Pinal Co., Arizona, United States
Formula: MoS₂
Availability: Sold
Size: 13 x 10 x 8 cm - Cabinet
Tagged: sulfide , ore specimen

Large specimen with good coverage of Molybdenite. Molybdenite contains about 60% molybdenum, which is used as a dry lubricant for high temperture applications where oil decompose.

Molybdenite

Formula: MoS₂
Crystal System: Hexagonal
Crystal Habit: Foliated, Massive, Disseminated
Cleavage: Perfect, None, None
Luster: Metallic
Color: black, lead gray, gray
Streak: greenish gray
Class: Hexagonal - Dihexagonal Dipyramidal
Fracture: Sectile
Hardness: 1

Collection: Arnold G Hampson Collection

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

SOLD

Pyrargyrite

- silver ore - #58539

Details
Data
Provenance
Resources

Locality: Colquechaca, Potosi dept., Bolivia
Formula: Ag₃SbS₃
Availability: Sold
Size: 10 x 8 x 8 cm - Cabinet
Tagged: sulfide , ore specimen , silver

Large vuggy specimen of nearly all Pyrargyrite, one of the ruby silvers. Crystals range from 1 to 6mm on this specimen. Pyrargyrite is an important ore and contains about 60% silver but is an uncommon silver ore. An incredible specimen for both bulk and crystals.

Pyrargyrite

Formula: Ag₃SbS₃
Crystal System: Trigonal
Crystal Habit: Massive, Crystalline - Poor, Prismatic
Cleavage: Poor, None, None
Luster: Sub Metallic
Color: deep red, red gray
Streak: cherry red
Class: Trigonal - Ditrigonal Pyramidal
Fracture: Brittle - Conchoidal
Hardness: 2.5

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

SOLD

Pyrrhotite

with Cummingtonite in drill core - gold ore - #58565

Details
Data
Provenance
Resources

Locality: Homestake mine, Lawrence Co., South Dakota, United States
Formula: Fe₇S₈
Availability: Sold
Size: 17 x 3.5 x 3.5 cm - Cabinet
Tagged: sulfide , ore specimen

This is a section of drill core from the Homestake Formation at the Homestake mine. Gold ore from the Homestake mine was hosted in formation, which typicallly contained Pyrrhotite (brassy in the photos) and Arsenopyrite in Cummingtonite schist.

Pyrrhotite

Formula: Fe₇S₈
Crystal System: Monoclinic
Crystal Habit: Tabular, Platy, Massive - Granular
Cleavage: Imperfect, Imperfect, None
Luster: Metallic
Color: bronze, bronze red, dark brown
Streak: gray black
Class: Monoclinic - Prismatic
Fracture: Uneven
Hardness: 3.5-4

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

SOLD

Scheelite

- tungsten ore - #58563

Details
Data
Provenance
Resources

Locality: Jardine mine, Park Co., Montana, United States
Formula: CaWO₄
Availability: Sold
Size: 11 x 7 x 3 cm - Cabinet
Tagged: ore mineral
Special Info: Fluorescent

A heavy specimen containing much tungsten from the fluorescent Scheelite ore.

According to the website Legends of America: Mining and milling of gold and low-grade scheelite ores began again in 1918 and in continued until 1921 when the properties were purchased by the Jardine Mining Company. The new company discovered arsenic and in 1923 built an arsenic plant, which operated almost continuously from 1923 to 1926, then intermittently until 1945. The mill continued to process various ores until 1948 when a fire destroyed the cyanide plant and the Jardine Mining Company closed the mill.

Scheelite

Formula: CaWO₄
Crystal System: Tetragonal
Crystal Habit: Massive - Granular, Disseminated, Columnar
Cleavage: Distinct, None, None
Luster: Vitreous (Glassy)
Color: colorless, white, pale yellow, brownish yellow, reddish yellow
Streak: white
Class: Tetragonal - Dipyramidal
Fracture: Uneven
Hardness: 4-5

Special Info: Fluorescent

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

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