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Mixed Minerals

Friday, 05 April 2019 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including fluorite, gordonite, gormanite, hocartite, joseite, and kobyashevite and more from places like Frunthorn, Vals Valley, Grischun, Switzerland, Little Green Monster mine, Clay Canyon, Fairfield, Utah Co., Utah, United States, Divino das Laranjereiras, Minas Gerais, Brazil, Oploca mine, Pirquitas, Rinconada Dept., Jujuy, Argentina, Wolfram Camp, Tablelands, Queensland, Australia, and Mina Ojuela, Mapimi, Durango, Mexico.

Fluorite

#50640
Locality
Frunthorn, Vals Valley, Grischun, Switzerland 
Formula
CaF2 
Availability
Sold
Size
1.5 x 1.7 x 1.4 cm - Thumbnail 

A single precious deep red Fluorite octahedron. One side is incomplete. These critters are very hard to find these days!


Fluorite

Formula
CaF2 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Massive - Granular, Disseminated 
Cleavage
Three perfect, octahedral cleavages. 
Luster
Vitreous (Glassy) 
Color
purple, clear, yellow, green, red, blue 
Streak
white 
Geological Setting
Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments  
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
Mineralpedia
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On Dakota Matrix
Previously Sold Fluorite
On Dakota Matrix
Other Available Fluorite
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Mindat
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SOLD
Gordonite - 50627
Gordonite - 50627

Gordonite

#50627
Locality
Little Green Monster mine, Clay Canyon, Fairfield, Utah Co., Utah, United States 
Formula
MgAl2(PO4)2(OH)2·8H2
Availability
Sold
Size
3.5 x 2.5 x 3 cm - Miniature 
Tagged
phosphate  
Special Info
Type Locality 

Colorless crystal groups to 2mm in vug.


Gordonite

Formula
MgAl2(PO4)2(OH)2·8H2
Crystal System
Triclinic 
Crystal Habit
Encrustations 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
colorless, gray white, white, light green, light pink 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5 
Collection
Dr. Buford Nichols Collection
Special Info
Type Locality
Mineralpedia
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Previously Sold Gordonite
On Dakota Matrix
Other Available Gordonite
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Mindat
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Gormanite

#50628
Locality
Divino das Laranjereiras, Minas Gerais, Brazil 
Formula
Fe2+3Al4(PO4)4(OH)6·2H2
Availability
Sold
Size
6 x 4 x 3 cm - Sm Cabinet 
Tagged
phosphate  

Green sprays of Gormanite to 8mm.


Gormanite

Formula
Fe2+3Al4(PO4)4(OH)6·2H2
Crystal System
Triclinic 
Crystal Habit
Radial, Aggregates, Bladed 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
blue green 
Streak
pale green 
Class
Triclinic 
Hardness
4-5 
Collection
Dr. Buford Nichols Collection
Mineralpedia
View Gormanite
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Hocartite

#50429
Locality
Oploca mine, Pirquitas, Rinconada Dept., Jujuy, Argentina 
Formula
Ag2FeSnS4 
Availability
Available
Price
$85.00
Size
3.3 x 2 x 0.8 cm - Miniature 
Tagged
tin , silver  

Hocartite is a tin sulfide with silver. This is a sawed specimen and has been tested according to Dr. Jaroslav Hrysl. There are no crystals on the specimen, only masses of silvery segregated areas in Pyrite.


Hocartite

Formula
Ag2FeSnS4 
Crystal System
Tetragonal 
Luster
Metallic 
Color
brownish gray 
Class
Tetragonal - Scalenohedral 
Hardness

Joseite

with Ikunolite - #50422
Locality
Wolfram Camp, Tablelands, Queensland, Australia 
Formula
Bi4TeS2 
Availability
Available
Price
$50.00
Size
0.5 x 0.4 x 0.1 cm - Thumbnail 

Thin silvery plate of Joseite/Ikunolite.


Joseite

Formula
Bi4(S,Te)3 
Crystal System
Trigonal 
Luster
Metallic 
Color
gray, grayish black 
Class
Trigonal - Hexagonal Scalenohedral 
Hardness
On Dakota Matrix
Previously Sold Joseite
On Dakota Matrix
Other Available Joseite
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Mindat
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Kobyashevite

on Calcite - #50630
Locality
Mina Ojuela, Mapimi, Durango, Mexico 
Formula
Cu5(SO4)2(OH)6·4H2
Availability
Sold
Size
8 x 5 x 5 cm - Sm Cabinet 

Anthropogenic specimen of this relatively new copper sulfate mineral originally found in Russia. The Kobyashevite is all the blue crusts which occurs on Calcite. The acicular crystals are selenite.


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