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Mixed Minerals

Friday, 16 December 2016 05:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including aragonite, arsenopyrite, bianchite, hopeite, malachite, and miargyrite and more from places like Touissit dist., Oujda-Angad prov., Oriental, Morocco, Hedley, Osoyoos Mining Division, British Columbia, Canada, St. Joe Minerals, St. Francois Co., Missouri, United States, Kabwe mine, Broken Hill, Kabwe dist., Central Province, Zambia, Mina Ojuela, Mapimi, Durango, Mexico, and Colquechaca, Potosi dept., Bolivia.

Aragonite

on Galena - #PD45993
Locality
Touissit dist., Oujda-Angad prov., Oriental, Morocco 
Formula
CaCO3 
Availability
Available
Price
$30.00
Size
10 x 9 x 3 cm - Cabinet 
Tagged
carbonate  

Interesting colorless to white to green compact crystals of Aragonite in weird blebs on matrix.


Aragonite

Formula
CaCO3 
Crystal System
Orthorhombic 
Crystal Habit
Pseudo Hexagonal, Columnar, Fibrous 
Cleavage
Distinct, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, white, gray, yellowish white, reddish white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Sub Conchoidal 
Hardness
3.5-4 
Collection
Phillips Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Aragonite
On Dakota Matrix
Other Available Aragonite
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Mindat
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SOLD
Arsenopyrite - PD46018
Arsenopyrite - PD46018

Arsenopyrite

(auriferous) - #PD46018
Locality
Hedley, Osoyoos Mining Division, British Columbia, Canada 
Formula
FeAsS 
Availability
Sold
Size
5.5 x 3 x 3.5 cm - Sm Cabinet 
Tagged
sulfide  

This is just a dull, silvery, metallic mass, which according to the old Ward's label is auriferous.


Arsenopyrite

Formula
FeAsS 
Crystal System
Monoclinic 
Crystal Habit
Striated, Euhedral Crystals, Prismatic 
Cleavage
one distinct 
Luster
Metallic 
Color
tin white, light steel gray 
Streak
black 
Geological Setting
Widespread. Most commonly found in medium to high temperature veins.  
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
5.5 to 6 
Collection
Phillips Collection
SOLD
Bianchite - PD32899
Bianchite - PD32899

Bianchite

with Sphalerite - #PD32899
Locality
St. Joe Minerals, St. Francois Co., Missouri, United States 
Formula
ZnSO4·6H2
Availability
Sold
Size
4 x 2.5 x 2.5 cm - Miniature 

Crusts of light green to white efflorescent Bianchite, an alteration and oxidation product of Sphalerite (or Wurtzite).


Bianchite

Formula
ZnSO4·6H2
Crystal System
Monoclinic 
Luster
Vitreous (Glassy) 
Color
colorless, yellow, yellowish white, white, light blue 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
2.5 
Collection
Phillips Collection

Hopeite

#BN46027
Locality
Kabwe mine, Broken Hill, Kabwe dist., Central Province, Zambia 
Formula
Zn3(PO4)2·4H2
Availability
Sold
Size
10.5 x 4.5 x 4 cm - Cabinet 
Tagged
phosphate  

A superb specimen of highly coveted Hopeite from Broken Hill in Zambia. The crystals are to 3mm and there are hundreds of these covering and crowning the interesting matrix. This is an excellent specimen of material long gone.


Hopeite

Formula
Zn3(PO4)2·4H2
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Reniform, Encrustations 
Cleavage
Perfect, Good, Poor 
Luster
Vitreous (Glassy) 
Color
colorless, gray white, yellow, white, light yellow 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
Collection
Dr. Buford L. Nichols Collection
Mineralpedia
View Hopeite
On Dakota Matrix
Previously Sold Hopeite
On Dakota Matrix
Other Available Hopeite
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Mindat
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Malachite

#BN46024
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
Cu2CO3(OH)2 
Availability
Sold
Size
7.5 x 5.5 x 3.5 cm - Sm Cabinet 
Tagged
carbonate , copper  

Nice green groups of Malachite with a coating of drusy Quartz. Old Dr. Al Kidwell specimen.


Malachite

Formula
Cu2CO3(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Botryoidal, Stalactitic, Massive - Fibrous 
Cleavage
Perfect, Fair, None 
Luster
Vitreous - Silky 
Color
green, dark green, blackish green 
Streak
light green 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
3.5-4 
Collection
Dr. Buford L. Nichols Collection
Mineralpedia
View Malachite
On Dakota Matrix
Previously Sold Malachite
On Dakota Matrix
Other Available Malachite
WebMineral
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Mindat
View Malachite

Miargyrite

#PD46008
Locality
Colquechaca, Potosi dept., Bolivia 
Formula
AgSbS2 
Availability
Sold
Size
4.5 x 3.5 x 4 cm - Miniature 
Tagged
sulfide , silver  
Special Info
EDS Confirmed 

The entire matrix of metallic silvery mineral is most likely Miargyrite. It was previously labeled as Stephanite. EDS has shown near equal ratio of silver to antimony. There is also a ruby red silver sulfosalt, which is probably Proustite. The face photographed is a fresh break.


Miargyrite

Formula
AgSbS2 
Crystal System
Monoclinic 
Crystal Habit
Euhedral Crystals, Disseminated, Massive 
Cleavage
Imperfect, None, None 
Luster
Sub Metallic 
Color
steel gray, lead gray, blackish red, reddish gray 
Streak
cherry red 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
2-2.5 
Collection
Phillips Collection
Special Info
EDS Confirmed

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