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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.

Bauxite

- aluminum ore - #49104
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

Becquerelite

with Uraninite & Carnotite - #58542
Locality
Monument #2 mine, Apache Co., Arizona, United States 
Formula
Ca(UO2)6O4(OH)6·8H2
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)6·8H2
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!!

Beryl

- beryllium ore - #DL58570
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

Bornite

with Tennantite & Enargite - copper ore - #58568
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
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
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.


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 
Collection
Robert J. Waidler Collection

Cassiterite

#58580
Locality
Ingersoll mine, Pennington Co., South Dakota, United States 
Formula
SnO2 
Availability
Sold
Size
8.5 x 5.5 x 5.5 cm - Sm Cabinet 
Tagged
ore specimen , tin  

Black crystalline, skeletal Cassiterite in Albite. Excellent specimen for the Black Hills. Ex. Willard Roberts collection with label.


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 

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