mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

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 Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States, Boar Tusk Mtn., Polk Co., Arkansas, United States, Girard, Girard dist., Burke Co., Georgia, United States, Three Oaks Gap, Polk Co., Arkansas, United States.

Cacoxenite

#DO46635
Locality
Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States 
Formula
(Fe3+)24AlO6(PO4)17(OH)12·75H2
Availability
Sold
Size
4.5 x 4 x 3 cm - Miniature 
Tagged
phosphate  

Golden fibrous crystals less than 1mm filling vugs in limonitic matrix.


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
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

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

on Beraunite & Strengite - #BN53076
Locality
Three Oaks Gap, Polk Co., Arkansas, United States 
Formula
NaFe3+9(PO4)6(OH)11·3H2
Availability
Sold
Size
13 x 10 x 6 cm - Cabinet 
Tagged
phosphate  

You get to looking at this specimen, and I think it is the best one in this Special Edition. I actually did not notice the Strengite at first. Those little purplish pink smooth balls are the Strengite. The fourth photo shows one of these balls. The Beraunite is rich and a flashy dark red, The crystals are lath-like to about 5mm. The Kidwellite is a dark green to a light greyish green. A very good specimen.


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

Kidwellite

with Beraunite - #BN53082
Locality
Three Oaks Gap, Polk Co., Arkansas, United States 
Formula
NaFe3+9(PO4)6(OH)11·3H2
Availability
Sold
Size
12 x 8 x 7 cm - Cabinet 
Tagged
phosphate  

This specimen rivals specimen #53060 for the best Beraunite. Specimen #53076, is also exceptional for Beraunite crystals.

This specimen shows a smaller area crystals versus the overal size of the specimen itself. Again the Beraunite is outstanding. It is like the others, a deep flashy red and is long bladed to about 2-3mm. The Kidwellite is a nice shade of green and occurs as distinct beads and globular groups. The matrix is that hard novaculite stuff, which is some kind of siliceous perhaps metamorphosed chert.


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

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2020 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map