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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 beraunite, cacoxenite and more from places like Three Oaks Gap, 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, Brewer mine, Cedartown, Polk Co., Georgia, United States, and Boar Tusk Mtn., Polk Co., Arkansas, United States.

SOLD

Beraunite

with Kidwellite - #BN53060

Details
Data
Provenance
Resources

Locality: Three Oaks Gap, Polk Co., Arkansas, United States
Formula: Fe²⁺Fe³⁺₅(PO₄)₄(OH)₅·6H₂O
Availability: Sold
Size: 6.5 x 4 x 3 cm - Sm Cabinet
Tagged: phosphate

The Beraunite on this specimen is perhaps unsurpassed by any other of the like. I have others on this update but these crystals seem to be sharper and more distinct. The crystals are a deep red, prismatic and striated and measure to 6 or 7mm. On the right side the Kidwellite covers the Beraunite with a dark green color.

Throughout this special edition I am keeping the historic identification as "Beraunite". Several of the Mindat localities in this part of the USA have switched the ID to Eleonorite. It is impossible to discern the the differnces visually. The two are of the same composition. Only the stoichiometery is diiferent. And it's a very subtle difference between ferrous and ferric iron.

Beraunite

Formula: Fe²⁺Fe³⁺₅(PO₄)₄(OH)₅·6H₂O
Crystal System: Monoclinic
Crystal Habit: Druse, Radial, Globular
Cleavage: Good, None, None
Luster: Vitreous - Dull
Color: green, greenish brown, gray green, dark greenish brown, dark red
Streak: green brown
Class: Monoclinic - Prismatic
Hardness: 2

Collection: Dr. Buford Nichols Collection

Mineralpedia: View Beraunite
On Dakota Matrix: Previously Sold Beraunite
On Dakota Matrix: Other Available Beraunite
WebMineral: View Beraunite
Mindat: View Beraunite

SOLD

Beraunite

with Kidwellite - #BN53075

Details
Data
Provenance
Resources

Locality: Three Oaks Gap, Polk Co., Arkansas, United States
Formula: Fe²⁺Fe³⁺₅(PO₄)₄(OH)₅·6H₂O
Availability: Sold
Size: 10 x 9 x 5 cm - Cabinet
Tagged: phosphate

A crazy rich specimen with bands of superb, deep red, lath-like crystals of Beraunite to 6mm. The bands are up to 1.3cm. On the Beraunite are globular Kidwellite. The matrix is a "novaculite", which is a localized term for siliceous chert.

It was collected by Meredith York, one of the members of the famous "Coon Creek" gang. Dr. Buford Nichols, one of the members, obtained it from York. This group along with Michael Howard served the mineral community well and was the source of many of these fine specimens. Howard wrote a great book called "Mineral Species of Arkansas - A Digest" published in 1987 by the Arkansas Geological Survy, Bulletin 23. I would highly recommend it as it is concise and well written.

Beraunite

Formula: Fe²⁺Fe³⁺₅(PO₄)₄(OH)₅·6H₂O
Crystal System: Monoclinic
Crystal Habit: Druse, Radial, Globular
Cleavage: Good, None, None
Luster: Vitreous - Dull
Color: green, greenish brown, gray green, dark greenish brown, dark red
Streak: green brown
Class: Monoclinic - Prismatic
Hardness: 2

Collection: Dr. Buford Nichols Collection

Mineralpedia: View Beraunite
On Dakota Matrix: Previously Sold Beraunite
On Dakota Matrix: Other Available Beraunite
WebMineral: View Beraunite
Mindat: View Beraunite

SOLD

Cacoxenite

#DO46634

Details
Data
Provenance
Resources

Locality: Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States
Formula: (Fe³⁺)₂₄AlO₆(PO₄)₁₇(OH)₁₂·75H₂O
Availability: Sold
Size: 6 x 5 x 3 cm - Sm Cabinet
Tagged: phosphate

Beautiful full spherical and radiating crystal groups of Cacoxenite less than 1mm in size on a red iron-oxide matrix. It is not as rich as some of the others in this update.

The specimen was collected by the late Don Owens. Don was prolific mineral collector, who was a member of the "Coon Creek Association", which also included some of the best mineralogists of our time: Mike Howard, the late Henry de Linde, the late Al Kidwell, the late Art Smith, and Buford Nichols. I never had the pleasure of meeting Don, however Henry de Linde hosted me while I viewed his collection several years ago. The other Union Carbide specimens in this Special Edition were also collected by Don Owens.

Cacoxenite

Formula: (Fe³⁺)₂₄AlO₆(PO₄)₁₇(OH)₁₂·75H₂O
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

Mineralpedia: View Cacoxenite
On Dakota Matrix: Previously Sold Cacoxenite
On Dakota Matrix: Other Available Cacoxenite
WebMineral: View Cacoxenite
Mindat: View Cacoxenite

SOLD

Cacoxenite

on Quartz - #AK53062

Details
Data
Provenance
Resources

Locality: Christy dep., Magnet Cove, Hot Spring Co., Arkansas, United States
Formula: (Fe³⁺)₂₄AlO₆(PO₄)₁₇(OH)₁₂·75H₂O
Availability: Sold
Size: 5 x 4 x 3 cm - Miniature
Tagged: phosphate