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Mixed Minerals

Sunday, 05 January 2020 05:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including pyrite, sklodowskite, and sphalerite and more from places like Sacremento pit, Bisbee, Cochise Co., Arizona, United States, Mine No. 18, Paliokamariza mines, Laurium, Attica, Greece, and Shui You Shan, Hunan Province, China.

Pyrite

#AH52051
Locality
Sacremento pit, Bisbee, Cochise Co., Arizona, United States 
Formula
FeS2 
Availability
Sold
Size
9 x 9 x 3.5 cm - Sm Cabinet 
Tagged
sulfide  

Clusters of 6-8mm Pyrite crystals.


Pyrite

Formula
FeS2 
Crystal System
Isometric 
Crystal Habit
Striated, Druse, Stalactitic 
Cleavage
Poor, Poor, None 
Luster
Metallic 
Color
pale brass yellow 
Streak
greenish black 
Class
Isometric - Diploidal 
Fracture
Conchoidal 
Hardness
6.5 
Collection
Arnold G Hampson Collection
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Mindat
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Sklodowskite

in Gypsum - #52086
Locality
Mine No. 18, Paliokamariza mines, Laurium, Attica, Greece 
Formula
Mg(UO2)2(SiO3OH)2·6H2
Availability
Available
Price
$75.00
Size
4 x 3.5 x 2.5 cm - Miniature 
Special Info
Fluorescent 

A nice yellow 3mm spray in Gypsum. Sklodowskite was the first uranium mineral to be found this locality and reported recently in 2017. It can be distinguished from other uranium minerals such as Uranophane and Boltwoodinte with UV. Much more information can be found on this find on Mindat in the article by Branko Rieck (click here).


Sklodowskite

Formula
Mg(UO2)2(SiO3OH)2·6H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
greenish yellow, light yellow 
Streak
yellow white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
2-3 
Special Info
Fluorescent

Sphalerite

with Calcite - #AH52069
Locality
Shui You Shan, Hunan Province, China 
Formula
ZnS 
Availability
Available
Price
$125.00
Size
16 x 10 x 6.5 cm - Cabinet 
Tagged
sulfide  

Large cabinet specimen of mostly discoidal Calcite crystals to 2cm. Some of the crystals are chipped, but not that bad. The main attraction are the hundreds of ruby red Sphalerite crystals to 3mm.


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 
Collection
Arnold G Hampson Collection

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