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Mixed Minerals

Sunday, 11 July 2021 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including chalcopyrite, clinocervantite, coconinoite, cosalite, covellite, and epidote and more from places like Cuartociengas, Coahuilla, Mexico, Tafone mine, Grosetto Province, Tuscany, Italy, Jomac mine, San Juan Co., Utah, United States, Bolivar mine, Piedras Verdes, Chihuahua, Mexico, Galactic pit, Summitville dist., Rio Grande Co., Colorado, United States, and Calumet Iron mine, Chaffee Co., Colorado, United States.

Chalcopyrite

on Quartz - #52658
Locality
Cuartociengas, Coahuilla, Mexico 
Formula
Cu1+Fe3+S2 
Availability
Available
Price
$125.00
Size
7 x 3 x 3 cm - Sm Cabinet 
Tagged
sulfide , copper  

Nice piece of Quartz totally coated with Chalcopyrite.


Chalcopyrite

Formula
Cu1+Fe3+S2 
Crystal System
Tetragonal 
Crystal Habit
Euhedral Crystals, Striated, Druse 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
brass yellow, honey yellow 
Streak
greenish black 
Class
Tetragonal - Scalenohedral 
Fracture
Brittle 
Hardness
3.5 
Collection
Barbara Cureton Collection

Clinocervantite

with Valentinite - #55933
Locality
Tafone mine, Grosetto Province, Tuscany, Italy 
Formula
Sb3+Sb5+O4 
Availability
Available
Price
$115.00
Size
3 x 3 x 2.5 cm - Thumbnail 

Tiny, less than 0.2mm, thin bladed colorless Clinocervantite crystals lining vugs with several acicular crystals of Valentinite to 3mm. Clinocervantite is a very rare antimony oxide found in only three localties worldwide.


Clinocervantite

Formula
Sb3+Sb5+O4 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Microscopic Crystals 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
colorless 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
SOLD
Coconinoite - AH56036
Coconinoite - AH56036

Coconinoite

#AH56036
Locality
Jomac mine, San Juan Co., Utah, United States 
Formula
Fe3+2Al2(UO2)2(PO4)4(SO4)(OH)2·20H2
Availability
Sold
Size
6.5 x 5.5 x 4 cm - Sm Cabinet 
Tagged
phosphate  
Special Info
Type Locality 

Light yellow, pulverulent Coconinoite on sandstone.


Coconinoite

Formula
Fe3+2Al2(UO2)2(PO4)4(SO4)(OH)2·20H2
Crystal System
Monoclinic 
Crystal Habit
Microscopic Crystals, Platy, Lath 
Color
yellow, cream yellow, light yellow 
Streak
white 
Class
Monoclinic 
Hardness
1-2 
Special Info
Type Locality

Cosalite

with Chalcopyrite - #55937
Locality
Bolivar mine, Piedras Verdes, Chihuahua, Mexico 
Formula
Pb2Bi2S5 
Availability
Available
Price
$250.00
Size
7 x 5 x 4 cm - Sm Cabinet 
Tagged
sulfide  

Silvery, acicular crystals to 7mm in Quartz matrix with Chalcopyrite. Excellent specimen.


Cosalite

Formula
Pb2Bi2S5 
Crystal System
Orthorhombic 
Crystal Habit
Radial, Massive - Fibrous 
Cleavage
Good, None, None 
Luster
Metallic 
Color
gray, steel gray, silver white 
Streak
black 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
2.5-3 
Mineralpedia
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On Dakota Matrix
Previously Sold Cosalite
On Dakota Matrix
Other Available Cosalite
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Covellite

#AH56061
Locality
Galactic pit, Summitville dist., Rio Grande Co., Colorado, United States 
Formula
CuS 
Availability
Sold
Size
14 x 7 x 7 cm - Cabinet 
Tagged
sulfide , copper  

Pretty much an ore specimen with dark purple coatings of Covellite.


Covellite

Formula
CuS 
Crystal System
Hexagonal 
Crystal Habit
Platy, Foliated 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
indigo blue, light blue, dark blue, black 
Streak
black gray 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Brittle 
Hardness
1.5-2 
Collection
Arnold G Hampson Collection
Mineralpedia
View Covellite
On Dakota Matrix
Previously Sold Covellite
On Dakota Matrix
Other Available Covellite
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Mindat
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Epidote

#AH56057
Locality
Calumet Iron mine, Chaffee Co., Colorado, United States 
Formula
Ca2Fe3+Al2(Si2O7)(SiO4)O(OH) 
Availability
Sold
Size
13 x 7 x 6 cm - Cabinet 

Deep green lustrous crystals to 4mm across the face. 


Epidote

Formula
Ca2Fe3+Al2(Si2O7)(SiO4)O(OH) 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Fibrous, Massive 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
yellowish green, brownish green, black, yellow, gray 
Streak
grayish white 
Class
Monoclinic - Prismatic 
Fracture
Regular 
Hardness
Mineralpedia
View Epidote
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Previously Sold Epidote
On Dakota Matrix
Other Available Epidote
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Mindat
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