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Southeast US Phosphates

Thursday, 23 April 2020 08:00 PM

Introducing the "Southeast US Phosphates" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including cacoxenite, kidwellite, and wavellite and more from places like Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States, York mine, Polk Co., Arkansas, United States, and Dug Hill, Avant, Garland Co., Arkansas, United States.

Cacoxenite

#DO53047
Locality
Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States 
Formula
(Fe3+)24AlO6(PO4)17(OH)12·75H2
Availability
Available
Price
$95.00
Size
6 x 5 x 5 cm - Sm Cabinet 
Tagged
phosphate  

It's a mind-blower under the scope. These golden sprays are less than 1mm in size but their color and perfection make them seem life size under the scope. 

Collected by Don Owens. The material is simply not available any longer. The pits are closed, flooded, and highly guarded.


Cacoxenite

Formula
(Fe3+)24AlO6(PO4)17(OH)12·75H2
Crystal System
Hexagonal 
Crystal Habit
Radial, Acicular, Stellate 
Cleavage
None, None, None 
Luster
Silky 
Color
brownish yellow, green, yellow, golden yellow, red yellow 
Streak
yellow 
Class
Hexagonal - Dihexagonal Dipyramidal 
Fracture
Uneven 
Hardness
3-3.5 
Collection
Don Owens Collection

Kidwellite

with Rockbridgeite - #BN53070
Locality
York mine, Polk Co., Arkansas, United States 
Formula
NaFe3+9(PO4)6(OH)11·3H2
Availability
Available
Price
$60.00
Size
7.5 x 5 x 6 cm - Sm Cabinet 
Tagged
phosphate  

Light green spherical Kidwellite groups to over 5mm on black, botryoidal Rockbridgeite. The Rockbridgeite ID is an assumption. It quite possible be Dufrenite. There is some minor Beraunite. Under the scope you will see several prismatic crystals which have either been coated or replaced by the black stuff. The centers of the Kidwellites all have an unidentified rusty red interior. 


Kidwellite

Formula
NaFe3+9(PO4)6(OH)11·3H2
Crystal System
Monoclinic 
Crystal Habit
Fibrous, Columnar 
Cleavage
Perfect, None, None 
Luster
Silky 
Color
greenish yellow, greenish white, yellow, light green 
Streak
yellow 
Class
Monoclinic - Prismatic 
Hardness
Collection
Dr. Buford Nichols Collection

Wavellite

with Variscite - #WR53071
Locality
Dug Hill, Avant, Garland Co., Arkansas, United States 
Formula
Al3(PO4)2(OH)3·5H2
Availability
Available
Price
$225.00
Size
8 x 8 x 4 cm - Sm Cabinet 
Tagged
phosphate  

Bright green sparkly crusts of Variscite with large hemispherical groups of Wavellite 8mm across. Lurking on the specimen are also bladed, colorless Strengite crystals in 2mm groups. 


Wavellite

Formula
Al3(PO4)2(OH)3·5H2
Crystal System
Orthorhombic 
Crystal Habit
Stellate, Radial, Stalactitic 
Cleavage
Perfect, Good, None 
Luster
Vitreous - Pearly 
Color
blue, brown, brownish black, colorless, green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Fibrous 
Hardness
3.5-4 
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