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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 alumoklyuchevskite, anglesite, antimony, baryte, bismuth, and bobcookite and more from places like Tolbachik Volcano, Kamchatka, Russia, Greystones quarry, Lezant, Cornwall, England, Arechuybo, Chihuahua, Mexico, Meikle mine, Elko Co., Nevada, United States, No. 38, Hammerberg, Schlema, Saxony, Germany, and Blue Lizard mine, Red Canyon, San Juan Co., Utah, United States.

Alumoklyuchevskite

#50452
Locality
Tolbachik Volcano, Kamchatka, Russia 
Formula
K3Cu2+3AlO2(SO4)4 
Availability
Sold
Size
2 x 1.8 x 2 cm - Thumbnail 
Tagged
copper  
Special Info
Type Locality 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 

Tiny acicular green crystals throughout vuggy matrix. Rich. Dr. Igor Pekov specimen.


Alumoklyuchevskite

Formula
K3Cu2+3AlO2(SO4)4 
Crystal System
Monoclinic 
Crystal Habit
Acicular, Prismatic 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
dark green 
Streak
light green 
Class
Monoclinic - Sphenoidal 
Hardness
Special Info
Type Locality
Special Info
XRD Confirmed
Special Info
EDS Confirmed

Anglesite

in Galena - #50376
Locality
Greystones quarry, Lezant, Cornwall, England 
Formula
PbSO4 
Availability
Sold
Size
6 x 5.5 x 3 cm - Sm Cabinet 

Colorless, prismatic crystals of Anglesite to 6mm in vuggy Galena matrix. The specimen comes with three old labels, the notable is an original Barstow specimen from his private collection stating it was collected by Barstow in 1960.


Anglesite

Formula
PbSO4 
Crystal System
Orthorhombic 
Crystal Habit
Granular, Stalactitic 
Cleavage
Good, Distinct, None 
Luster
Adamantine 
Color
blue, colorless, green, gray, yellow 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
2.5-3 
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Antimony

#50624
Locality
Arechuybo, Chihuahua, Mexico 
Formula
Sb 
Availability
Sold
Size
5 x 2.5 x 4 cm - Miniature 
Tagged
native element  

Botryoidal silver native Antimony. Awesome specimen.


Antimony

Formula
Sb 
Crystal System
Trigonal 
Crystal Habit
Massive - Lamellar, Massive, Reticulate 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
light gray, tin white 
Streak
lead gray 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle 
Hardness
3-3.5 
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Baryte

#50641
Locality
Meikle mine, Elko Co., Nevada, United States 
Formula
BaSO4 
Availability
Sold
Size
3.5 x 2.5 x 2.5 cm - Miniature 

Yellow-amber large tabular crystal to 3cm perched nicely on matrix. These are hard to find. No damage, excellent shape.


Baryte

Formula
BaSO4 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Prismatic, Massive - Fibrous 
Cleavage
Perfect, Perfect, Imperfect 
Luster
Vitreous (Glassy) 
Color
white, yellowish white, grayish white, brownish white, dark brown 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
3-3.5 
Mineralpedia
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Bismuth

#50416
Locality
No. 38, Hammerberg, Schlema, Saxony, Germany 
Formula
Bi 
Availability
Sold
Size
1.8 x 1.8 x 1.5 cm - Thumbnail 
Tagged
native element  

Excellent hopper crystals of Bismuth with coverage throughout.


Bismuth

Formula
Bi 
Crystal System
Trigonal 
Crystal Habit
Platy, Lamellar, Granular 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
silver white, pinkish white, red 
Streak
silver white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
2-2.5 
Mineralpedia
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Bobcookite

with Pickeringite - #50406
Locality
Blue Lizard mine, Red Canyon, San Juan Co., Utah, United States 
Formula
NaAl(UO2)2(SO4)4ยท18H2
Availability
Sold
Size
2 x 1.5 x 1 cm - Thumbnail 
Special Info
Fluorescent 
Special Info
Type Locality 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 

Bobcookite is a relatively new IMA mineral named after my good friend Dr. Bob Cook. It is easily observed as it is highly flourescent green and occurs as yellowish green glassy crystals with white silky Pickeringite. This is the fourth occurence, but all are in the same district. It is not found anywhere else.


Special Info
Fluorescent
Special Info
Type Locality
Special Info
XRD Confirmed
Special Info
EDS Confirmed

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