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Mixed Minerals

Sunday, 19 May 2019 12:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including clausthalite, crocoite, ferristrunzite, gustavite, nifontovite, and tetrahedrite and more from places like Zorge, Bad Sachsa, Harz, Lower Saxony, Germany, Adelaide mine, Dundas, Tasmania, Australia, Mont-des-Groseillers, Blaton, Mons, Henegouwen, Belgium, Arsenic mine, Lower Rotgülden lake, Rotgülden, Salzburg, Austria, Mina Rey y Reina, Charcas, San Luis Potosi, Mexico, and Julcani mine, Julcani dist., Huancavelica dept., Peru.

Clausthalite

with Tiemannite - #50351
Locality
Zorge, Bad Sachsa, Harz, Lower Saxony, Germany 
Formula
PbSe 
Availability
Available
Price
$255.00
Size
3.5 x 2 x 2 cm - Miniature 
Special Info
Microprobed 

There are two specimens: the mineral and the sliced and mounted specimen used for the identification of the mineral. The specimen is sliced in preparation for the microbrobe mount. It also carries and old inked label.


Clausthalite

Formula
PbSe 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Massive - Granular, Granular 
Cleavage
Perfect, Perfect, Perfect 
Luster
Metallic 
Color
lead gray, blue gray, grayish black 
Streak
grayish black 
Class
Isometric - Hexoctahedral 
Fracture
Brittle 
Hardness
2.5 
Special Info
Microprobed

Crocoite

#50747
Locality
Adelaide mine, Dundas, Tasmania, Australia 
Formula
PbCrO4 
Availability
Available
Price
$95.00
Size
7.5 x 5 x 4.5 cm - Sm Cabinet 

Cabinet specimn of red Crocoite crystals to 1.5cm with most showing hollow crystal forms.


Crocoite

Formula
PbCrO4 
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Coarse, Massive - Granular, Acicular 
Cleavage
Distinct, Indistinct, Indistinct 
Luster
Adamantine 
Color
yellow, orange, red, red orange 
Streak
yellowish orange 
Class
Monoclinic - Prismatic 
Fracture
Sectile 
Hardness
2.5-3 
Collection
Robert J. Waidler Collection
Mineralpedia
View Crocoite
On Dakota Matrix
Previously Sold Crocoite
On Dakota Matrix
Other Available Crocoite
WebMineral
View Crocoite
Mindat
View Crocoite

Ferristrunzite

#49612
Locality
Mont-des-Groseillers, Blaton, Mons, Henegouwen, Belgium 
Formula
Fe3+Fe3+2(PO4)2(OH)3·5H2
Availability
Available
Price
$150.00
Size
7 x 3.5 x 2 cm - Sm Cabinet 
Tagged
phosphate  

This is an exceptional Ferristrunzite specimen. The light yellow to white fibrous crystals are in sprays to about 1.5mm. The crystals are very distinct with good definition unlike most that you may see on the market. 


Ferristrunzite

Formula
Fe3+Fe3+2(PO4)2(OH)3·5H2
Crystal System
Triclinic 
Crystal Habit
Acicular, Aggregates 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
brownish yellow, light yellow 
Streak
light yellow 
Class
Triclinic 
Hardness
Collection
Dr. Buford Nichols Collection

Gustavite

with Pavonite, Bismuth, Bismuthinite - #50354
Locality
Arsenic mine, Lower Rotgülden lake, Rotgülden, Salzburg, Austria 
Formula
AgPbBi3S6 
Availability
Available
Price
$95.00
Size
5 x 4.5 x 4 cm - Miniature 
Tagged
sulfide , silver  

An ex-Dr. Werner Paar specimen with said minerals. The large silvery group to 1.5cm is probably the Bismuthinite, the Gustavite and Pavonite are probably sub-microscopic or very micro at best. 


Gustavite

Formula
AgPbBi3S6 
Crystal System
Orthorhombic 
Crystal Habit
Tabular 
Cleavage
Distinct, Distinct, None 
Luster
Metallic 
Color
steel gray 
Streak
gray 
Class
Orthorhombic - Dipyramidal 
Hardness
3.5 
Mineralpedia
View Gustavite
On Dakota Matrix
Previously Sold Gustavite
On Dakota Matrix
Other Available Gustavite
WebMineral
View Gustavite
Mindat
View Gustavite

Nifontovite

#50713
Locality
Mina Rey y Reina, Charcas, San Luis Potosi, Mexico 
Formula
Ca3[BO(OH)2]6·2H2
Availability
Available
Price
$225.00
Size
4.5 x 3 x 3 cm - Miniature 

Superb long colorless crystals to 2cm. Pretty much all of the larger crystals are complete and terminated. Exceptional piece.


Nifontovite

Formula
Ca3[BO(OH)2]6·2H2
Crystal System
Monoclinic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, gray 
Streak
white 
Class
Monoclinic 
Hardness
3.5 

Tetrahedrite

with Pyrite - #50748
Locality
Julcani mine, Julcani dist., Huancavelica dept., Peru 
Formula
Cu12Sb4S13 
Availability
Available
Price
$125.00
Size
8 x 8 x 2.5 cm - Sm Cabinet 
Tagged
sulfide , copper  

Full tetrahedrons of Tetrahedrite crystals to 6mm. Most of the crystals are "merged" or stack upon each other. The backside is full of Pyrite crystals,


Tetrahedrite

Formula
Cu12Sb4S13 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
iron gray, black, steel gray 
Streak
black 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 
Collection
Robert J. Waidler Collection

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