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Rare & Systematic Minerals

Friday, 07 February 2020 09:00 PM

Introducing the "Rare & Systematic Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including stilbite, tennantite, titantaramellite, tooeleite, variscite, and wohlerite and more from places like Jalgaon dist., Maharashtra, India, Mimosa mine, Julcani dist., Huancavelica, Peru, Big Creek, Fresno Co., California, United States, U.S. mine, Gold Hill mine, Tooele Co., Utah, United States, Little Green Monster mine, Clay Canyon, Fairfield, Utah Co., Utah, United States, and L�ven, Langesundsfjorden, Larvik, Vestfold, Norway.

Stilbite

on Quartz - #52296
Locality
Jalgaon dist., Maharashtra, India 
Formula
NaCa4(Si27Al9)O72·28H2
Availability
Sold
Size
11 x 11 x 4.5 cm - Cabinet 

Nice light pink crystals of Stilbite to 1.7mm on drusy Quartz matrix.


Stilbite

Collection
Arnold G Hampson Collection
Mineralpedia
View Stilbite-Ca
On Dakota Matrix
Previously Sold Stilbite
On Dakota Matrix
Other Available Stilbite
WebMineral
View Stilbite
Mindat
View Stilbite

Tennantite

#RW51314
Locality
Mimosa mine, Julcani dist., Huancavelica, Peru 
Formula
Cu12As4S13 
Availability
Sold
Size
11 x 8 x 4 cm - Cabinet 
Tagged
sulfide , copper  

Large plate full of 1 to 1.5cm Tennantite crystals.


Tennantite

Formula
Cu12As4S13 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Massive, Disseminated 
Cleavage
None, None, None 
Luster
Metallic 
Color
steel gray, black 
Streak
reddish gray 
Class
Isometric - Hextetrahedral 
Fracture
Hackly 
Hardness
3.5-4 
Collection
Robert Waidler Collection

Titantaramellite

with Gillespite - #42280
Locality
Big Creek, Fresno Co., California, United States 
Formula
Ba4(Ti,Fe3+,Mg)4(O,OH)2[B2Si8O27]Clx 
Availability
Sold
Size
4 x 3 x 2.5 cm - Miniature 
Special Info
Type Locality 

Rich coverage of black-looking, vitreous crystal grains to 1mm throughout matrix with large grains of Gillespite to 6mm. Rare,


Titantaramellite

Formula
Ba4(Ti,Fe3+,Mg)4(O,OH)2[B2Si8O27]Clx 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Anhedral Grains 
Cleavage
Perfect, None, None 
Color
bronze brown, purple red 
Class
Orthorhombic - Dipyramidal 
Hardness
5.5-6 
Special Info
Type Locality
SOLD
Tooeleite - 52260
Tooeleite - 52260

Tooeleite

#52260
Locality
U.S. mine, Gold Hill mine, Tooele Co., Utah, United States 
Formula
Fe3+6(AsO3)4SO4(OH)4·4H2
Availability
Sold
Size
2 x 1.5 x 1 cm - Thumbnail 
Tagged
arsenate  
Special Info
Type Locality 

Goldish-yellow to brown rosettes and single crystals less than 1mm. According to Mindat Tooeleite is the  only arsenite-sulfate presently known in Nature. This is a very rare mineral occuring at maybe 5 or 6 localities worldwide. This is the type locality.


Tooeleite

Formula
Fe3+6(AsO3)4SO4(OH)4·4H2
Crystal System
Monoclinic 
Crystal Habit
Encrustations, Bladed, Powdery 
Cleavage
Good, None, None 
Luster
Greasy (Oily) 
Color
brown orange, yellow orange 
Streak
orange 
Class
Monoclinic - Prismatic 
Hardness
Special Info
Type Locality
Mineralpedia
View Tooeleite
On Dakota Matrix
Previously Sold Tooeleite
On Dakota Matrix
Other Available Tooeleite
WebMineral
View Tooeleite
Mindat
View Tooeleite

Variscite

with Crandalite - #AH52247
Locality
Little Green Monster mine, Clay Canyon, Fairfield, Utah Co., Utah, United States 
Formula
AlPO4·2H2
Availability
Sold
Size
6 x 6 x 1 cm - Sm Cabinet 

A polished slab of phosphate nudule from this famous mine located by Ed Over and art Montgomeryite, both of which have minerals named after them from this locality. The green here is Variscite and the yellow is Crandallite.


Variscite

Formula
AlPO4·2H2
Crystal System
Orthorhombic 
Crystal Habit
Massive, Encrustations, Reniform 
Cleavage
Perfect, None, None 
Luster
Earthy (Dull) 
Color
blue green, colorless, green, light green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
4-5 
Collection
Arnold G Hampson Collection
Mineralpedia
View Variscite
On Dakota Matrix
Previously Sold Variscite
On Dakota Matrix
Other Available Variscite
WebMineral
View Variscite
Mindat
View Variscite

Wohlerite

with Catapleiite - #DP52206
Locality
L�ven, Langesundsfjorden, Larvik, Vestfold, Norway 
Formula
NaCa2(Zr,Nb)(Si2O7)(O,F)2 
Availability
Sold
Size
6 x 5 x 5 cm - Sm Cabinet 

A pegmatitic mass of white Microcline, black Aegerine and rare minerals of thick tabular crystals of yellow Wohlerite and brown crystals of Catapleiite or Lavenite. Excellent specimen.


Wohlerite

Formula
NaCa2(Zr,Nb)(Si2O7)(O,F)2 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Tabular, Granular 
Cleavage
Distinct, Poor, Poor 
Luster
Vitreous - Greasy 
Color
yellow, dark yellow, gray, brown 
Streak
pale yellow 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Splintery 
Hardness
5.5-6 
Collection
Don Phillips Collection
Mineralpedia
View Wohlerite
On Dakota Matrix
Previously Sold Wohlerite
On Dakota Matrix
Other Available Wohlerite
WebMineral
View Wohlerite
Mindat
View Wohlerite

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