mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Ore Minerals 5

Tuesday, 31 January 2017 09:00 AM

A favorite subject amongst geologists/mineral collectors, the Ore Minerals SE will have several ore examples from some of the most famous mines in the world. Take a look at Ore Minerals  4 for a taste of what Ore Minerals 5 will be like.

Pyrrhotite

with Galena & Sphalerite - #45267
Locality
Sullivan mine, Kimberly, British Columbia, Canada 
Formula
Fe7S8 
Availability
Sold
Size
13 x 7 x 4 cm - Cabinet 
Tagged
sulfide  

Ore specimen of mostly Pyrrhotite with a cut side showing unique mineralization in the sediment hosted ore deposit of the Sullivan mine, a giant amongst Canadian mines.

The Sullivan mine was discovered in 1892 and is credited with developing a metallurgical technique to separate lead and zinc during the milling process. The process, developed in 1916, was eventually used worldwide. More than 285 million troy ounces of Silver were produced as well as the lead and zinc, a combined worth of $20 million. It was eventually closed in 2001, after 92 years of production. Source Wikipedia. 

1 lb 4 oz, cut and polished one side.


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 
Collection
Chris van Laer Collection

Rhodochrosite

with Galena and Sphalerite - #45688
Locality
Butte dist., Silver Bow Co., Montana, United States 
Formula
MnCO3 
Availability
Sold
Size
11 x 8 x 4.5 cm - Cabinet 
Tagged
carbonate  

A large specimen cut on one side which shows the unique crystallization of the Rhodochrosite as well as the inward growth patterns of the Galena and Sphalerite. Rhodochrosite is an ore of manganese and more can be learned from our Butte mine article.

2lbs 4 oz.


Rhodochrosite

Formula
MnCO3 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Columnar, Botryoidal 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, rose red, yellowish gray, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Chris van Laer Collection

Stibnite

#45891
Locality
Lolo Pass, Missoula Co., Montana, United States 
Formula
Sb2S3 
Availability
Sold
Size
9 x 4 x 4 cm - Sm Cabinet 
Tagged
sulfide  

Long bladed Stibnite crystals in compacted texture. The exact locality on Lolo Pass is not known.

Stibnite is the chief of antimony. It's use is varied and about 50% of the antimony produced is used for metal alloys in storage batteries, power transmission equipment, solder, bearings, and ammunition. It is not ductile nor malleable and has a low melting poit of 630.5 deg. C. 


Stibnite

Formula
Sb2S3 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Striated, Granular 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
lead gray, bluish lead gray, steel gray, black 
Streak
blackish gray 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
Collection
Chris van Laer Collection
Mineralpedia
View Stibnite
On Dakota Matrix
Previously Sold Stibnite
On Dakota Matrix
Other Available Stibnite
WebMineral
View Stibnite
Mindat
View Stibnite
SOLD
Sulphur - 46310
Sulphur - 46310

Sulphur

#46310
Locality
Goldfield, Esmeralda Co., Nevada, United States 
Formula
Availability
Sold
Size
11 x 9 x 5 cm - Cabinet 
Tagged
native element  

This is only a 7 oz specimen but large because of the low SG of Sulfur. 

A fabulous summary of the Goldfield orebody by N.N. Brandes, can be found on Mindat.com. Basically Goldfield is said to be the largest sulfidizied gold ore body in North America. This event occured when hydrothermal solutions rich in HCl and SO2 from a shallow pluton encountered meteoric waters which leached volcanic and silicied rocks and deposited sulfides, gold and some tellurides. Gold ore reached 500 or more ounces per ton. Goldfield was once Nevada's largest city and reached a population of 20,000 five years after the first claims were stacked in 1902. Interestingly enough elemental sulfur is not on the Mindat list, and thus this may be a smelter product.


Sulphur

Collection
Chris van Laer Collection
Mineralpedia
View Sulphur
On Dakota Matrix
Previously Sold Sulphur
On Dakota Matrix
Other Available Sulphur
WebMineral
View Sulphur
Mindat
View Sulphur

Tennantite

#45842
Locality
Butte dist., Silver Bow Co., Montana, United States 
Formula
Cu12As4S13 
Availability
Sold
Size
6 x 4 x 4.5 cm - Sm Cabinet 
Tagged
sulfide , copper  

A rich chunk of Tennantite.


Tennantite

Formula
Cu12As4S13 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Massive, Disseminated 
Cleavage
None, None, None 
Luster
Metallic 
Color
steel gray, black 
Streak
reddish gray 
Class
Isometric - Hextetrahedral 
Fracture
Hackly 
Hardness
3.5-4 
Collection
Chris van Laer Collection

Tetrahedrite

var. friebergite - #46312
Locality
Bunker Hill mine, Shoshone Co., Idaho, United States 
Formula
Cu12Sb4S13 
Availability
Sold
Size
10 x 5 x 4 cm - Cabinet 
Tagged
sulfide , copper  

Sawed and polished on one side, this specimen shows the layered and folded nature of the rock. 


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
Chris van Laer Collection

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2019 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map