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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 cuprosklodowskite, elbaite, gypsum, and sphalerite and more from places like Musonoi mine, Kolwezi, Shaba Cu belt, Democratic Republic of Congo, Himalaya mine, San Diego Co., California, United States, Thuringa, Germany, Mine No. 18, Paliokamariza mines, Laurium, Attica, Greece, and Shui You Shan, Hunan Province, China.

Cuprosklodowskite

with Vandenbrandeite - #52090
Locality
Musonoi mine, Kolwezi, Shaba Cu belt, Democratic Republic of Congo 
Formula
Cu(UO2)2(SiO3OH)2·6H2
Availability
Available
Price
$350.00
Size
6.5 x 3.5 x 3 cm - Sm Cabinet 
Tagged
copper  
Special Info
Radioactive!! 

Bright green sprays of Cuprosklodowskite with dark micro Vandenbrandeite. Radioactive!

I would prefer to deliver this to Tucson, if the buyer is going.


Cuprosklodowskite

Formula
Cu(UO2)2(SiO3OH)2·6H2
Crystal System
Triclinic 
Crystal Habit
Acicular, Radial 
Cleavage
Good, None, None 
Luster
Vitreous - Silky 
Color
grass green, green yellow, light green 
Streak
greenish yellow 
Class
Triclinic - Pinacoidal 
Fracture
Uneven 
Hardness
Special Info
Radioactive!!

Elbaite

tourmailne - #AH52087
Locality
Himalaya mine, San Diego Co., California, United States 
Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Availability
Available
Price
$295.00
Size
5 x 2.5 x 2.5 cm - Miniature 

Stubby pink tourmaline with deep striations and a thin blue cap terminations. It's not perfect, there are a few chips along the corners of the terminatio and it is dull not real lustrous. It's priced accordingly.


Elbaite

Formula
Na(Al1.5Li1.5)Al6(BO3)3Si6O18(OH)4 
Crystal System
Trigonal 
Crystal Habit
Striated, Prismatic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
blue, colorless, green, yellow, white 
Streak
white 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Sub Conchoidal 
Hardness
7.5 
Collection
Arnold G Hampson Collection
Mineralpedia
View Elbaite
On Dakota Matrix
Previously Sold Elbaite
On Dakota Matrix
Other Available Elbaite
WebMineral
View Elbaite
Mindat
View Elbaite

Gypsum

var. selenite - #AH52074
Locality
Thuringa, Germany 
Formula
CaSO4·2H2
Availability
Available
Price
$20.00
Size
8 x 2.3 x 0.9 cm - Sm Cabinet 

A colorless prismatic crystal of selenite, a variety of Gypsum.


Gypsum

Formula
CaSO4·2H2
Crystal System
Monoclinic 
Crystal Habit
Tabular, Crystalline - Coarse, Massive - Fibrous 
Cleavage
Perfect, Distinct, Distinct 
Luster
Pearly 
Color
white, colorless, yellowish white, greenish white, brown 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Fibrous 
Hardness
Collection
Arnold G Hampson Collection
On Dakota Matrix
Previously Sold Gypsum
On Dakota Matrix
Other Available Gypsum
WebMineral
View Gypsum
Mindat
View Gypsum

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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