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  

Mixed Minerals

Friday, 28 June 2019 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including bornite, cobaltite, domeykite, fairfieldite, ferrowodginite, and fluorite and more from places like Bristol, Hartford Co., Connecticut, United States, Blackbird mine, Lemhi Co., Idaho, United States, Mohawk mine, Keweenaw Co., Michigan, United States, Foote mine, Cleveland Co., North Carolina, United States, Nyanga No. 2 pegmatite, Ankole, Uganda, and Golden Sunlight mine, Jefferson Co., Montana, United States.

Bornite

in Quartz - #49112
Locality
Bristol, Hartford Co., Connecticut, United States 
Formula
Cu5FeS4 
Availability
Available
Price
$95.00
Size
11.5 x 9 x 8.5 cm - Cabinet 
Tagged
sulfide , copper , ore specimen  

Massive bluish grey Bornite veins with Quartz.


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
Collection
Chris van Laer Collection
Mineralpedia
View Bornite
On Dakota Matrix
Previously Sold Bornite
On Dakota Matrix
Other Available Bornite
WebMineral
View Bornite
Mindat
View Bornite
SOLD
Cobaltite - 49108
Cobaltite - 49108

Cobaltite

#49108
Locality
Blackbird mine, Lemhi Co., Idaho, United States 
Formula
CoAsS 
Availability
Sold
Size
15 x 9 x 10 cm - Cabinet 
Tagged
ore mineral , sulfide  

Large ore specimen of mostly dense, tiny, crystals of Cobaltite, partially altered to Erythrite. 


Cobaltite

Formula
CoAsS 
Crystal System
Orthorhombic 
Crystal Habit
Massive - Granular, Striated, Granular 
Cleavage
Good, Good, Good 
Luster
Metallic 
Color
reddish silver white, violet steel gray, black 
Streak
grayish black 
Class
Orthorhombic - Pyramidal 
Fracture
Brittle 
Hardness
5.5 
Collection
Chris van Laer Collection

Domeykite

#50751
Locality
Mohawk mine, Keweenaw Co., Michigan, United States 
Formula
Cu3As 
Availability
Available
Price
$45.00
Size
5 x 4.5 x 3 cm - Miniature 
Tagged
sulfide , copper  

Metallic, heavy mass of tarnished Domeykite. Fresh surfaces reveal a brassy metallic color.


Domeykite

Formula
Cu3As 
Crystal System
Isometric 
Crystal Habit
Botryoidal, Reniform, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
gray, yellow brown, silver white, tin white 
Streak
black gray 
Class
Isometric - Hextetrahedral 
Fracture
Brittle - Sectile 
Hardness
3-3.5 
Collection
Robert J. Waidler Collection

Fairfieldite

#50972
Locality
Foote mine, Cleveland Co., North Carolina, United States 
Formula
Ca2Mn2+(PO4)2·2H2
Availability
Sold
Size
9 x 5 x 2 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

Plate of feldspar with abundant murky white and rice-shaped crystals of Fairfieldite to 2mm. This is an excellent specimen, not only for this locality but for any pegmatite locality.


Fairfieldite

Formula
Ca2Mn2+(PO4)2·2H2
Crystal System
Triclinic 
Crystal Habit
Foliated, Fibrous, Euhedral Crystals 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous - Pearly 
Color
greenish white, white, light yellow 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle - Uneven 
Hardness
3.5 
Collection
Dr. Albert Kidwell collection
SOLD
Ferrowodginite - 50990
Ferrowodginite - 50990

Ferrowodginite

#50990
Locality
Nyanga No. 2 pegmatite, Ankole, Uganda 
Formula
Fe2+(Sn4+,Ti,Ta,Fe3+)(Ta,Nb)2O8 
Availability
Sold
Size
0.4 x 0.3 x 0.3 cm - Thumbnail 
Tagged
tin  

Black crystal grain.


Ferrowodginite

Formula
Fe2+(Sn4+,Ti,Ta,Fe3+)(Ta,Nb)2O8 
Crystal System
Monoclinic 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
dark brown, black 
Streak
dark brown 
Class
Monoclinic - Prismatic 
Hardness
5.5 

Fluorite

with Pyrite in hornfels - #49111
Locality
Golden Sunlight mine, Jefferson Co., Montana, United States 
Formula
CaF2 
Availability
Sold
Size
11.5 x 9 x 10 cm - Cabinet 
Tagged
ore mineral  

This specimen was mined from the Golden Sunlight mine in northern Montana and exhibits impregnation of Fluorite and sulfides (mostly Pyrite) of hornfels. It is sawed and nicely polished on one side. Impressive ore textures.


Fluorite

Formula
CaF2 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Massive - Granular, Disseminated 
Cleavage
Three perfect, octahedral cleavages. 
Luster
Vitreous (Glassy) 
Color
purple, clear, yellow, green, red, blue 
Streak
white 
Geological Setting
Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments  
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
Collection
Chris van Laer Collection
Mineralpedia
View Fluorite
On Dakota Matrix
Previously Sold Fluorite
On Dakota Matrix
Other Available Fluorite
WebMineral
View Fluorite
Mindat
View Fluorite

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