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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 scheelite, skutterudite, sphalerite, spodumene, and stannite and more from places like Jardine mine, Park Co., Montana, United States, Rustex mine, Gowganda area, Timiskaming dist., Ontario, Canada, Pro Patria mine, Rico dist., Dolores Co., Colorado, United States, Tin Mountain mine, Custer Co., South Dakota, United States, and Wheal Rock, Porthtowan, St Agnes, Cornwall, England.

Scheelite

- tungsten ore - #58563
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
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Skutterudite

- cobalt ore - #51274
Locality
Rustex mine, Gowganda area, Timiskaming dist., Ontario, Canada 
Formula
CoAs3-x 
Availability
Available
Price
$30.00
Size
6 x 4 x 3 cm - Sm Cabinet 
Tagged
sulfide , ore specimen  

Mass of grey, metallic Skutterudite, an ore of cobalt.


Skutterudite

Formula
CoAs3-x 
Crystal System
Isometric 
Crystal Habit
Granular, Colloform, Massive 
Cleavage
Distinct, Distinct, None 
Luster
Metallic 
Color
white, light steel gray 
Streak
black 
Class
Isometric - Diploidal 
Fracture
Brittle 
Hardness
5.5-6 

Sphalerite

with Galena - zinc ore - #AH58551
Locality
Pro Patria mine, Rico dist., Dolores Co., Colorado, United States 
Formula
ZnS 
Availability
Sold
Size
11 x 8 x 3 cm - Cabinet 
Tagged
sulfide , ore specimen  

Dark greenish yellow Sphalerite mixed with Galena, Chalcopyrite and Rhodonite.


Sphalerite

Formula
ZnS 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Granular, Colloform 
Cleavage
Perfect, Perfect, Perfect 
Luster
Resinous - Greasy 
Color
brown, yellow, red, green, black 
Streak
brownish white 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 
Collection
Arnold G Hampson Collection

Spodumene

var. kunzite - lithium ore - #58566
Locality
Tin Mountain mine, Custer Co., South Dakota, United States 
Formula
LiAlSi2O6 
Availability
Sold
Size
9 x 9 x 4 cm - Sm Cabinet 
Tagged
ore specimen , pegmatite mineral  

Pinkish lilac colored crystal section of Spodumene, variety kunzite. It is not gemmy but rather opaque. The Tin Mountain pegmatite had some of the biggest Spodumene crystals in the world on the order of tens of feet. Spodumene contains about 3.7% lithium. The US is a leading consumer of lithium while Australia is the leading producer ahead of Chile and China.


Spodumene

Formula
LiAlSi2O6 
Crystal System
Monoclinic 
Crystal Habit
Bladed, Prismatic 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
grayish white, pink, violet, emerald green, yellow 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Splintery 
Hardness
6.5-7 
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Spodumene

var. hiddenite - lithium ore - #58567
Locality
Tin Mountain mine, Custer Co., South Dakota, United States 
Formula
LiAlSi2O6 
Availability
Sold
Size
11 x 3.5 x 2.5 cm - Cabinet 
Tagged
ore specimen , pegmatite mineral  

Light green Spodumene with some translucency. Green Spodumene as well as pink spodumene is rare for the Black Hills. Spodumene, which contains lithium, is used for electric car batteries, ceramics, and glass.


Spodumene

Formula
LiAlSi2O6 
Crystal System
Monoclinic 
Crystal Habit
Bladed, Prismatic 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
grayish white, pink, violet, emerald green, yellow 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Splintery 
Hardness
6.5-7 
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Stannite

- tin ore - #58125
Locality
Wheal Rock, Porthtowan, St Agnes, Cornwall, England 
Formula
Cu2FeSnS4 
Availability
Sold
Size
7 x 5 x 6 cm - Sm Cabinet 
Tagged
ore mineral , sulfide , copper , tin  

This is a chunk of Stannite which has a dull grey tarnished surface. It is split and shows a shiny silvery luster. It is a primary ore of tin, although not as common as Cassiterite. Stannite carries 29.6% copper and 27.6% tin. The mineral is chiefly found in high temperature hydrothermal vein deposits. Stannite is relatively soft with a hardness of 4 and has a density of 4.3 - 4.5. This is the type localty.


Stannite

Formula
Cu2FeSnS4 
Crystal System
Tetragonal 
Crystal Habit
Massive - Granular, Crystalline - Fine 
Cleavage
Imperfect, None, None 
Luster
Metallic 
Color
blue, grayish black, steel gray 
Streak
black 
Class
Tetragonal - Scalenohedral 
Fracture
Uneven 
Hardness
3.5-4 
Collection
Bill Wilson Collection
On Dakota Matrix
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