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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 tetrahedrite, topaz, tourmaline, uraninite, and zincite and more from places like Pride of the West mine, San Juan Co., Colorado, United States, Lord Hill pegmatite, Stoneham, Oxford Co., Maine, United States, Blue Bird mine, Colorado dist., Jefferson Co., Montana, United States, Big Buck mine, San Juan Co., Utah, United States, and Franklin, Sussex Co., New Jersey, United States.

Tetrahedrite

with Galena - #AH54721
Locality
Pride of the West mine, San Juan Co., Colorado, United States 
Formula
Cu12Sb4S13 
Availability
Sold
Size
6 x 4.5 x 3 cm - Sm Cabinet 
Tagged
sulfide , copper , ore specimen  

Tiny 1mm crystals and grains of Tetrahedrite with Galena. A good locality specimen.


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 
Collection
Arnold G Hampson Collection

Topaz

#49106
Locality
Lord Hill pegmatite, Stoneham, Oxford Co., Maine, United States 
Formula
Al2SiO4F2 
Availability
Sold
Size
17 x 13 x 8 cm - Cabinet 

I can't say much about the photos, but the specimen is magnificent. It is a huge blue Topaz crystal from the Chris van Laer collection. It's hardly gemmy, but internally fractured. The cyrstal has four faces with a typical pryamidal face of Topaz. I am not sure if Chris collected this specimen, but his label clearly states it is from the Lord Hill pegmatite.


Topaz

Formula
Al2SiO4F2 
Crystal System
Orthorhombic 
Crystal Habit
Crystalline - Coarse, Prismatic, Massive - Granular 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, pale blue, yellow, yellowish brown, red 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
Collection
Chris van Laer Collection
Mineralpedia
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Tourmaline

in Andesite breccia silver - gold ore - #49109
Locality
Blue Bird mine, Colorado dist., Jefferson Co., Montana, United States 
Formula
A(D3)G6(T6O18)(BO3)3X3
Availability
Sold
Size
16 x 13 x 9 cm - Cabinet 
Tagged
ore specimen  

This is a large, heavy specimen of brecciated andesite flooded with black tourmaline during the mineralization. It is sawed and polishd on one side. It is fascinating to look at all the different angular clasts which range in size from 2 to 60mm. Sulfides can be seen replacing some of the clasts and as fine disseminations and thin 1mm or less veinlets. 

The Blue Bird was mined for Silver, but also produced gold, copper, lead, zinc and antimony from 1887 to 1957. 


Tourmaline

Formula
Ca,Na,K[(Al,Fe2+,Fe3+,Li,Mg2+,Mn2+)3](Al,Cr3+,Fe3+,V3+)6(Si6O18)(BO3)3(O,OH)3(F,O,OH) 
Crystal System
Trigonal 
Fracture
Irregular/Uneven-Conchoidal 
Hardness
Collection
Chris van Laer Collection

Uraninite

- uranium ore - #AH58552
Locality
Big Buck mine, San Juan Co., Utah, United States 
Formula
UO2 
Availability
Sold
Size
4.5 x 3.5 x 3 cm - Miniature 
Tagged
ore specimen  
Special Info
Radioactive!! 

Nearly a solid mass of Uraninite.


Uraninite

Formula
UO2 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Botryoidal, Dendritic 
Cleavage
Good, None, None 
Luster
Sub Metallic 
Color
brownish black, gray, grayish black, black 
Streak
brownish black 
Class
Isometric - Hexoctahedral 
Fracture
Brittle - Conchoidal 
Hardness
5-6 
Collection
Arnold G Hampson Collection
Special Info
Radioactive!!

Zincite

- zinc ore - #AH58554
Locality
Franklin, Sussex Co., New Jersey, United States 
Formula
ZnO 
Availability
Sold
Size
7.5 x 5.5 x 2.5 cm - Sm Cabinet 
Tagged
ore specimen  
Special Info
Type Locality 

Deep red, large crystalline Zincite. Zincite is the least abundant of the three zinc ores at Franklin, but is also the richest in zinc and contains 80% zinc as compared with about 19 % Zn in franklinite and 58 % Zn in willemite. 


Zincite

Formula
ZnO 
Crystal System
Hexagonal 
Crystal Habit
Massive - Fibrous, Granular, Disseminated 
Cleavage
Perfect, None, None 
Luster
Sub Metallic 
Color
yellow, dark yellow, dark red, orange 
Streak
yellowish orange 
Class
Hexagonal - Dihexagonal Pyramidal 
Fracture
Sub Conchoidal 
Hardness
4-5 
Collection
Arnold G Hampson Collection
Special Info
Type Locality
Mineralpedia
View Zincite
On Dakota Matrix
Previously Sold Zincite
On Dakota Matrix
Other Available Zincite
WebMineral
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Mindat
View Zincite

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