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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, churchite-(y), kidwellite and more from places like Boar Tusk Mtn., Polk Co., Arkansas, United States, Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States, Christy dep., Magnet Cove, Hot Spring Co., Arkansas, United States, Girard, Girard dist., Burke Co., Georgia, United States, York mine, Polk Co., Arkansas, United States, and Three Oaks Gap, Polk Co., Arkansas, United States.

SOLD
Cacoxenite - BN48040
Cacoxenite - BN48040

Cacoxenite

#BN48040
Locality
Boar Tusk Mtn., Polk Co., Arkansas, United States 
Formula
(Fe3+)24AlO6(PO4)17(OH)12·75H2
Availability
Sold
Size
3 x 2.5 x 2 cm - Thumbnail 
Tagged
phosphate  

This is mostly a locality specimen but also has beautiful golden yellow sprays of fibrous Cacoxenite.


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
Dr. Buford Nichols Collection

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

Cacoxenite

on Quartz - #AK53062
Locality
Christy dep., Magnet Cove, Hot Spring Co., Arkansas, United States 
Formula
(Fe3+)24AlO6(PO4)17(OH)12·75H2
Availability
Sold
Size
5 x 4 x 3 cm - Miniature 
Tagged
phosphate  

The Cacoxenite is the yellow crusts on Quartz. There are no stand-out fibrous crystals. It is just a unique colorful piece.


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
Dr. Albert Kidwell collection

Churchite-(Y)

#AK53072
Locality
Girard, Girard dist., Burke Co., Georgia, United States 
Formula
YPO4·2H2
Availability
Sold
Size
0.7 x 0.6 x 0.3 cm - Thumbnail 
Tagged
phosphate , REE mineral  

A 7mm specimen with 0.5mm white sprays.


Churchite-(Y)

Formula
YPO4·2H2
Crystal System
Monoclinic 
Crystal Habit
Platy, Acicular, Aggregates 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
colorless, gray, snow white 
Streak
white 
Class
Monoclinic 
Fracture
Conchoidal 
Hardness
Collection
Dr. Albert Kidwell 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

Kidwellite

with Beraunite - #BN53081
Locality
Three Oaks Gap, Polk Co., Arkansas, United States 
Formula
NaFe3+9(PO4)6(OH)11·3H2
Availability
Sold
Size
17 x 10 x 6 cm - Cabinet 
Tagged
phosphate  

Large specimen! The Kidwellite occurs as cloud-like formations, bubbly and globular in habit. It also shows colors of greens and yellows, which grades from a dark green on the left to a forrest green, light green and then a nice yellowish green and finally a flat out yellow near the center of the photo. On the far right side the Kidwellite covers bladed red Beraunite. The last photo shows the Beraunite.


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

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