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Mixed Minerals

Friday, 09 October 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including andorite, andradite, anglesite, arsenic, baryte, and belyankinite and more from places like Itos mine, near Oruro City, Oruro Dept., Bolivia, Stanley Butte, Graham Co., Arizona, United States, Monteponi mine, Iglesias, Sardinia, Italy, Port Alberni, Vancouver Island, British Columbia, Canada, Montreal mine, Iron Co., Wisconsin, United States, and Kedykverpakhk Mt., Lovozero Massif, Kola Peninsula, Russia.

Andorite

with Pyrite - #BC52637
Locality
Itos mine, near Oruro City, Oruro Dept., Bolivia 
Formula
Ag15Pb18Sb47S96 
Availability
Available
Price
$195.00
Size
7 x 7 x 2.5 cm - Sm Cabinet 

Several groups of tabular and striated rare Andorite crystals. Individual crystals maesure up to 6mm. 


Andorite

Formula
PbAgSb3S6 
Crystal System
Orthorhombic 
Crystal Habit
Striated, Tabular 
Cleavage
None, None, None 
Luster
Metallic 
Color
grayish yellow, dark gray, steel gray 
Streak
black 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3-3.5 
Collection
Barbara Cureton Collection
Mineralpedia
View Andorite
On Dakota Matrix
Previously Sold Andorite
On Dakota Matrix
Other Available Andorite
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Mindat
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Andradite

#AH54222
Locality
Stanley Butte, Graham Co., Arizona, United States 
Formula
Ca3Fe3+2(SiO4)3 
Availability
Sold
Size
5 x 4 x 2 cm - Miniature 

Yellowish green Andradite. 


Andradite

Formula
Ca3Fe3+2(SiO4)3 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Euhedral Crystals, Massive 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
black, yellowish brown, red, greenish yellow, gray 
Streak
white 
Class
Isometric - Hexoctahedral 
Fracture
Conchoidal 
Hardness
6.5-7 
Collection
Arnold G Hampson Collection
Mineralpedia
View Andradite
On Dakota Matrix
Previously Sold Andradite
On Dakota Matrix
Other Available Andradite
WebMineral
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Mindat
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Anglesite

in Galena - #BC52686
Locality
Monteponi mine, Iglesias, Sardinia, Italy 
Formula
PbSO4 
Availability
Sold
Size
6.5 x 6 x 4 cm - Sm Cabinet 

For those of you who like to study crystallography this is a great specimen. There are numerous colorless complex crystals of Anglesite to about 6mm lining the Galena vug. You will enjoy studying this specimen as each crystal is unique.


Anglesite

Formula
PbSO4 
Crystal System
Orthorhombic 
Crystal Habit
Granular, Stalactitic 
Cleavage
Good, Distinct, None 
Luster
Adamantine 
Color
blue, colorless, green, gray, yellow 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
2.5-3 
Collection
Barbara Cureton Collection
Mineralpedia
View Anglesite
On Dakota Matrix
Previously Sold Anglesite
On Dakota Matrix
Other Available Anglesite
WebMineral
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Mindat
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Arsenic

#WR54235
Locality
Port Alberni, Vancouver Island, British Columbia, Canada 
Formula
As 
Availability
Available
Price
$375.00
Size
9 x 6 x 3 cm - Sm Cabinet 
Tagged
native element  

I don't know if the specimen is waterworn, and I can't explain the natural smooth surface. But is an unusual specimen, heavy and rare. It is one of the largest arsenic specimens I have seen come across my desk. Quite unique! There is a note on one of the older labels stating "extra good specimen, from my own collection". I assume the recipient was Bill Roberts, but I am not sure who made that statement, but I am sure is is true, even today.


Arsenic

Formula
As 
Crystal System
Trigonal 
Crystal Habit
Nodular, Reniform, Lamellar 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
lead gray, gray, white 
Streak
black 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
3.5 
Collection
Willard L. Roberts Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Arsenic
On Dakota Matrix
Other Available Arsenic
WebMineral
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Mindat
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Baryte

on Hematite - #BC52693
Locality
Montreal mine, Iron Co., Wisconsin, United States 
Formula
BaSO4 
Availability
Sold
Size
11 x 8 x 7 cm - Cabinet 

Cabinet specimen of peach colored Baryte roses to over 2.5cm on dark brown Hematite. This is a choice specimen from the highly sought after Montreal mine in upper Wisconsin.


Baryte

Formula
BaSO4 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Prismatic, Massive - Fibrous 
Cleavage
Perfect, Perfect, Imperfect 
Luster
Vitreous (Glassy) 
Color
white, yellowish white, grayish white, brownish white, dark brown 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
3-3.5 
Collection
Barbara Cureton Collection
Mineralpedia
View Baryte
On Dakota Matrix
Previously Sold Baryte
On Dakota Matrix
Other Available Baryte
WebMineral
View Baryte
Mindat
View Baryte

Belyankinite

#PD54037
Locality
Kedykverpakhk Mt., Lovozero Massif, Kola Peninsula, Russia 
Formula
Ca1-2(Ti,Nb)5O12 ยท 9H2O (?) 
Availability
Available
Price
$35.00
Size
3 x 1.5 x 1.5 cm - Thumbnail 
Tagged
pegmatite mineral  

The Belyankinite is the cream colored plate, a two-locality titanium-niobium mineral found at two localities worldwide.


Belyankinite

Formula
Ca1-2(Ti,Zr,Nb5O12*9(H2O) (?) 
Crystal System
No Crystals 
Crystal Habit
Platy, Aggregates 
Cleavage
Perfect 
Luster
Vitreous - Greasy 
Color
yellow, brownish yellow 
Class
Amorphous - No Crystals 
Fracture
Brittle - Uneven 
Hardness
2-3 

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