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Ore Minerals

Thursday, 02 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 bauxite, becquerelite, beryl, bornite, cassiterite and more from places like Pulaski Bauxite District, Pulaski Co., Arkansas, United States, Monument #2 mine, Apache Co., Arizona, United States, Hale's quarry, Portland, Middlesex Co., Connecticut, United States, Chelopech Au-Cu Mine, Sofia Province, Bulgaria, Llallagua, Bolivia, and Ingersoll mine, Pennington Co., South Dakota, United States.

SOLD

Bauxite

- aluminum ore - #49104

Details
Provenance
Resources

Locality: Pulaski Bauxite District, Pulaski Co., Arkansas, United States
Formula: AlO(OH)
Availability: Sold
Size: 12 x 8.5 x 7 cm - Cabinet
Tagged: ore specimen

Text book example of aluminum ore from the Pulaski Bauxite district with the typical texture of Bauxite, containing rounded pisolitic grains to 8mm of Gibbsite and the polymorphs Diaspore and Bohmite in shades of brown and orange-brown.

The Bauxite deposits were discovered in Arkansas in 1842 by Dr. W. Byrd Powell and mining began several decades later in 1892 when the peculiur rock was discovered to be an ore of Aluminium. The approximate Bauxite production in Arkansas from 1898 to 2009 is estimated to be 110 million long tons, valued at an estimated $1 billion. For more info see the Encyclopedia of Arkansas-Bauxite Mining page.

Collection: Chris van Laer Collection

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

SOLD

Becquerelite

with Uraninite & Carnotite - #58542

Details
Data
Provenance
Resources

Locality: Monument #2 mine, Apache Co., Arizona, United States
Formula: Ca(UO₂)₆O₄(OH)₆·8H₂O
Availability: Sold
Size: 9 x 5.5 x 4 cm - Sm Cabinet
Tagged: ore specimen
Special Info: Radioactive!!

Orange massive Becquerelite altered from black Uraninite with pulverulent Carnotite. Obtained by Hampson in 1960 from an ore truck driver.

Becquerelite

Formula: Ca(UO₂)₆O₄(OH)₆·8H₂O
Crystal System: Orthorhombic
Crystal Habit: Crystalline - Fine
Cleavage: Perfect, Perfect, None
Luster: Resinous
Color: brownish yellow, golden yellow, orange, lemon
Streak: yellow
Class: Orthorhombic - Pyramidal
Hardness: 2.5

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

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

SOLD

Beryl

- beryllium ore - #DL58570

Details
Data
Provenance
Resources

Locality: Hale's quarry, Portland, Middlesex Co., Connecticut, United States
Formula: Be₃Al₂Si₆O₁₈
Availability: Sold
Size: 12 x 10 x 7 cm - Cabinet
Tagged: ore mineral , beryllium , pegmatite mineral

A large bluish green Beryl crystal with a termination 10cm across. A thorough explanation of the mine can be found on Mindat, please click here Hale quarry summary. Beryl contains about 14% beryllium oxide and is usually found in granite pegmatites. Beryllium is one of the lightest of all metals and has one of the highest melting points. Much of the beryllium produced is used in beryllium copper alloys used in springs, electrical contacts, spot-welding electrodes, and in aero-space applications.

Beryl

Formula: Be₃Al₂Si₆O₁₈
Crystal System: Hexagonal
Crystal Habit: Crystalline - Coarse, Prismatic, Columnar
Cleavage: Imperfect, None, None
Luster: Vitreous - Resinous
Color: green, blue, yellow, colorless, pink
Streak: white
Class: Hexagonal - Dihexagonal Dipyramidal
Fracture: Brittle - Conchoidal
Hardness: 7.5-8

Collection: Dr. David London Collection

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

SOLD

Bornite

with Tennantite & Enargite - copper ore - #58568

Details
Data
Provenance
Resources

Locality: Chelopech Au-Cu Mine, Sofia Province, Bulgaria
Formula: Cu₅FeS₄
Availability: Sold
Size: 15 x 5.5 x 5 cm - Cabinet
Tagged: copper , ore specimen , sulfides

Rich specimen full of iridescent Bornite with some Tennantite and Enargite. Bornite is a common and widespread copper ore found in hydrothermal deposits in the supergene enrichment zones of copper porphyries. The specimen comes with an old company report which describes the locality, history and geology.

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

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

Cassiterite

- tin ore - #RW58135

$75.00 - Available
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Details
Data
Provenance
Resources

Locality: Llallagua, Bolivia
Formula: SnO₂
Availability: Available
Price: $75.00
Size: 8 x 6.5 x 4 cm - Sm Cabinet
Tagged: ore specimen , tin

The specimen is solid Cassiterite with several pseudo-octahedral dark brown crystals to 8mm. Cassiterite is the main ore of tin and contains up to 79% tin. Historically tin was used in tinplates for tin cans and in bronze, which contained about 9% tin. Modern uses of tin include electroplating steel, bronze wire and cable, bearings and bushings, gears, and screws since it is resistant to corrosion. It is non-toxic and thus used in food-processing equipment.

Llallagua is an important producer of tin ore, with moderate temperature sulfide veins containing Bi-Pb-Ag sulfide.