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Mixed Minerals

Sunday, 19 February 2023 04:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including alwilkinsite-(y), antlerite, billingsleyite, bohseite, gold, and greenockite and more from places like Limes, Val Daone, Trento, Trentino Alto Adige, Italy, Santa Catalina mine, Sierra Gorda, Atacama prov., Chile, Clara mine, Wolfach, Schwarzwald, Baden-Wurttemberg, Germany, Ermakovskoe Be deposit, Buryatia, Siberia, Russia, Fire Creek mine, Lander Co., Nevada, United States, and Berta quarry, El Papiol, Barcelona, Catalonia, Spain.

Alwilkinsite-(Y)

#61045
Locality
Limes, Val Daone, Trento, Trentino Alto Adige, Italy 
Formula
Y(UO2)3(SO4)2O(OH)3(H2O)7 ยท 7H2
Availability
Sold
Size
3.3 x 2.2 x 1.3 cm - Miniature 
Tagged
REE mineral  
Special Info
Radioactive!! 
Special Info
Type Locality 

Bright yellow microscopic needles in nestled aggregates. Alwilkinsite-(Y) is named in honor of Al Wilkins, who discovered the mineral at the Blue Lizard mine, the original locality. This is the second reported locality.


Alwilkinsite-(Y)

Special Info
Radioactive!!
Special Info
Type Locality

Antlerite

#BAC61089
Locality
Santa Catalina mine, Sierra Gorda, Atacama prov., Chile 
Formula
Cu2+3SO4(OH)4 
Availability
Sold
Size
7.5 x 4 x 2.5 cm - Sm Cabinet 
Tagged
copper  

Flashy emerald green plates.


Antlerite

Formula
Cu2+3SO4(OH)4 
Crystal System
Orthorhombic 
Crystal Habit
Acicular, Concretionary, Reniform 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
green, light green, emerald green, black, black green 
Streak
pale green 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
Collection
William & Anne Cook Collection
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Billingsleyite

#61076
Locality
Clara mine, Wolfach, Schwarzwald, Baden-Wurttemberg, Germany 
Formula
Ag7AsS6 
Availability
Available
Price
$195.00
Size
.9 x .6 x 1 cm - Thumbnail 
Tagged
sulfide , silver  

There are at least three individual crystals on this specimen. All are in the range of 0.1 to 0.2mm in size. Each are blocky and dull black and are associated with colorless Fluorite. Billingsleyite is a fairly rare mineral and is found at only 12 localities acrsos the world. 


Billingsleyite

Formula
Ag7AsS6 
Crystal System
Orthorhombic 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
lead gray 
Class
Orthorhombic - Disphenoidal 
Hardness
2.5 

Bohseite

with Fluorite - #60956
Locality
Ermakovskoe Be deposit, Buryatia, Siberia, Russia 
Formula
Ca4Be3AlSi9O25(OH)3 
Availability
Sold
Size
3.5 x 3 x 2.5 cm - Miniature 
Tagged
beryllium , pegmatite mineral  

Very rich specimen with pearly white crystal plates to 6mm with purple Fluorite and Microcline. Attractive rare mineral specimen.


Bohseite

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Gold

#61088
Locality
Fire Creek mine, Lander Co., Nevada, United States 
Formula
Au 
Availability
Available
Price
$325.00
Size
2.3 x 2 x 1.8 cm - Thumbnail 
Tagged
native element  

Fire Creek Gold specimens are light Gold indicating a higher than normal portion of Silver. It has a reputation of some of the finest crystallized Gold showing beautiful arborescent growth with numerous forms of cubic crystals. This is a fine specimen.


Gold

Formula
Au 
Crystal System
Isometric 
Crystal Habit
Arborescent, Platy, Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
yellow, pale yellow, orange, yellow white, reddish white 
Streak
yellow 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
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Greenockite

#61002
Locality
Berta quarry, El Papiol, Barcelona, Catalonia, Spain 
Formula
CdS 
Availability
Sold
Size
6 x 6 x 2.5 cm - Sm Cabinet 
Tagged
sulfide  

Mustard yelllow earthy coatings.


Greenockite

Formula
CdS 
Crystal System
Hexagonal 
Crystal Habit
Radial, Encrustations, Colloform 
Cleavage
Distinct, Imperfect, None 
Luster
Adamantine - Resinous 
Color
honey yellow, citron yellow, orange yellow 
Streak
orange yellow 
Class
Hexagonal - Dihexagonal Pyramidal 
Fracture
Uneven 
Hardness
3.5-4 

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