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Mixed Minerals

Friday, 28 June 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 shortite, silver, sphalerite, thaumasite, and theresemagnanite and more from places like Westvaco mine, Sweet Water Co., Wyoming, United States, Dolly Varden Silver mine, British Columbia, Canada, White Pine mine, Ontonagon Co., Michigan, United States, Emperius mine, Creede, Mineral Co., Colorado, United States, Paterson, Passiac Co., New Jersey, United States, and Cap Garonne mine, Le Pradet, Var, France.

Shortite

#50985
Locality
Westvaco mine, Sweet Water Co., Wyoming, United States 
Formula
Na2Ca2(CO3)3 
Availability
Sold
Size
6 x 5 x 4 cm - Sm Cabinet 
Tagged
carbonate  

White to colorless blocky or pseudo-cubic crystals of Shortite to 4mm in shaley matrix.


Shortite

Formula
Na2Ca2(CO3)3 
Crystal System
Orthorhombic 
Crystal Habit
Tabular 
Cleavage
Distinct, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, light yellow 
Streak
white 
Class
Orthorhombic - Pyramidal 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Dr. Albert Kidwell collection
Mineralpedia
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Previously Sold Shortite
On Dakota Matrix
Other Available Shortite
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Silver

with Acanthite - #50958
Locality
Dolly Varden Silver mine, British Columbia, Canada 
Formula
Ag 
Availability
Sold
Size
12 x 6 x 4 cm - Cabinet 
Tagged
ore mineral , native element  

Leaf Silver with dull black Acanthite in matrix.  I believe this is an operating mine.


Silver

Formula
Ag 
Crystal System
Isometric 
Crystal Habit
Arborescent, Dendritic, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
silver white, gray white, gray 
Streak
silver white 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Mineralpedia
View Silver
On Dakota Matrix
Previously Sold Silver
On Dakota Matrix
Other Available Silver
WebMineral
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Mindat
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Silver

with Copper - #50996
Locality
White Pine mine, Ontonagon Co., Michigan, United States 
Formula
Ag 
Availability
Sold
Size
11 x 5.5 x 5 cm - Cabinet 
Tagged
native element  

Large Copper nugget with rounded Silver. 


Silver

Formula
Ag 
Crystal System
Isometric 
Crystal Habit
Arborescent, Dendritic, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
silver white, gray white, gray 
Streak
silver white 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Collection
Robert J. Waidler Collection
Mineralpedia
View Silver
On Dakota Matrix
Previously Sold Silver
On Dakota Matrix
Other Available Silver
WebMineral
View Silver
Mindat
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Sphalerite

with Galena - #50971
Locality
Emperius mine, Creede, Mineral Co., Colorado, United States 
Formula
ZnS 
Availability
Sold
Size
8.5 x 5 x 4 cm - Sm Cabinet 
Tagged
sulfide  

A most interesting specimen with excellent crystals of both green and yellow Sphalerite crystals to 3mm. Galena as well as Pyrite are also present.


Sphalerite

Formula
ZnS 
Crystal System
Isometric 
Crystal Habit
Euhedral Crystals, Granular, Colloform 
Cleavage
Perfect, Perfect, Perfect 
Luster
Resinous - Greasy 
Color
brown, yellow, red, green, black 
Streak
brownish white 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
3.5-4 

Thaumasite

on Prehnite - #BM50957
Locality
Paterson, Passiac Co., New Jersey, United States 
Formula
Ca3Si(OH)6(SO4)(CO3)·12H2
Availability
Sold
Size
7.5 x 5 x 3.5 cm - Sm Cabinet 
Tagged
carbonate  

White to brown coating of Thaumasite on faint green Prehnite. Ex. J. Cilen.


Thaumasite

Formula
Ca3Si(OH)6(SO4)(CO3)·12H2
Crystal System
Hexagonal 
Crystal Habit
Radial, Massive - Fibrous, Fibrous 
Cleavage
Poor, None, None 
Luster
Vitreous - Silky 
Color
colorless, white 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5 
Collection
Bill McConlogue Collection

Theresemagnanite

#50989
Locality
Cap Garonne mine, Le Pradet, Var, France 
Formula
Co6SO4(OH)10·8H2
Availability
Sold
Size
1.1 x 1.3 x 0.3 cm - Thumbnail 
Special Info
Type & Only Locality 

Tiny, less than 0.2mm, purplish spherulites or crystal clusters across matrix. Extremely rare.


Theresemagnanite

Formula
Co6SO4(OH)10·8H2
Crystal System
Hexagonal 
Crystal Habit
Thin, Platy, Spherical 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
pink, light pink 
Streak
white 
Class
Hexagonal - Pyramidal 
Fracture
Irregular 
Hardness
1.5-2 
Special Info
Type & Only Locality

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