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1 item @ $40.00  

Colorado Plateau Minerals

Saturday, 13 January 2024 05:30 PM

The Colorado Plateau encompasses a large area of the southwest including Arizona, Colorado, New Mexico and Utah. Many of these minerals are formed in roll front uranium deposits. They can be bright yellow or orange and beautiful to see under the microscope.

SOLD
Doloresite - BAC63182
Doloresite - BAC63182

Doloresite

#BAC63182
Locality
Monument #2 mine, Apache Co., Arizona, United States 
Formula
V4+3O4(OH)4 
Availability
Sold
Size
3.5 x 1.8 x 1.7 cm - Miniature 
Tagged
vanadium  

This is basically a sandstone specimen which iis pregnated with glossy black Doloresite.


Doloresite

Formula
V4+3O4(OH)4 
Crystal System
Monoclinic 
Crystal Habit
Botryoidal, Twinning Common 
Cleavage
Good, None, None 
Luster
Sub Metallic 
Color
dark brown, black 
Streak
greenish black 
Class
Monoclinic - Prismatic 
Fracture
Fibrous 
Hardness
Collection
William & Anne Cook Collection

Fervanite

#BAC63198
Locality
Gypsum Valley dist., San Miguel Co., Colorado, United States 
Formula
Fe3+4V5+4O16·5H2
Availability
Sold
Size
4 x 2.3 x 2.2 cm - Miniature 
Tagged
vanadium  
Special Info
Type Locality 

Golden fibrous Fervanite crystals up to 4mm in length at random, but oriented groups in sandstone matrix. The original label does not mention a specific mine only the district of "Gypsum Valley". There are three occurences in the district tabulated or mapped on Mindat, which is the Sullivan Brothers claim, Truck Group, and the Yellow Jacket occurence". Clicking on the GeoNames there are around a dozen other mines.


Fervanite

Formula
Fe3+4V5+4O16·5H2
Crystal System
Monoclinic 
Crystal Habit
Fibrous 
Cleavage
None, None, None 
Luster
Adamantine 
Color
yellow, brown, pale green 
Streak
yellowish brown 
Class
Monoclinic 
Hardness
Collection
William & Anne Cook Collection
Special Info
Type Locality
Mineralpedia
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On Dakota Matrix
Previously Sold Fervanite
On Dakota Matrix
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Mindat
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Hewettite

#AH63165
Locality
Cactus Rat mine, Grand Co., Utah, United States 
Formula
CaV5+6O16·9H2
Availability
Sold
Size
9 x 6.5 x 4 cm - Sm Cabinet 
Tagged
vanadium  

Large specimen of conglomerate with flash rusty red Hewettite throughout carbonized mass.


Hewettite

Formula
CaV5+6O16·9H2
Crystal System
Monoclinic 
Crystal Habit
Acicular 
Luster
Silky 
Color
red 
Streak
brownish red 
Class
Monoclinic - Prismatic 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Hewettite
On Dakota Matrix
Other Available Hewettite
WebMineral
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Mindat
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Hewettite

#BAC63202
Locality
Cactus Rat mine, Grand Co., Utah, United States 
Formula
CaV5+6O16·9H2
Availability
Sold
Size
1.8 x 0.8 x 0.6 cm - Thumbnail 
Tagged
vanadium  

Excellent long fibrous Hewettite crystals to 7mm. Small specimen.


Hewettite

Formula
CaV5+6O16·9H2
Crystal System
Monoclinic 
Crystal Habit
Acicular 
Luster
Silky 
Color
red 
Streak
brownish red 
Class
Monoclinic - Prismatic 
Hardness
Collection
William & Anne Cook Collection
Mineralpedia
View Hewettite
On Dakota Matrix
Previously Sold Hewettite
On Dakota Matrix
Other Available Hewettite
WebMineral
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Mindat
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Kokinosite

with Lasalite - #57728
Locality
Pickett Corral mine, Montrose Co., Colorado, United States 
Formula
Na2Ca2(V10O28) · 24H2
Availability
Sold
Size
4 x 1.5 x 0.6 cm - Miniature 

A specimen of Kokinosite, a relatively new mineral published in 2014 by Dr. Anthony Kampf et al and originally found at the St. Jude mine, San Miguel County, Colorado. This specimen was collected by Joe Marty, one of the authors of the original publcation. Please note that this is a new locality for the mineral. The Kokinosite are the opaque orange 1-3mm groups consisting of 0.5-1mm crystals. Associated are darker, translucent crystals of Lasalite (last photo). This is an exceptional specimen of this rare mineral.


Kokinosite

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Lasalite - BAC63199
Lasalite - BAC63199

Lasalite

#BAC63199
Locality
Vanadium Queen mine, near La Sal, San Juan Co., Utah, United States 
Formula
Na2Mg2(V10O28)·20H2
Availability
Sold
Size
3 x 1 x 2 cm - Thumbnail 
Tagged
vanadium  
Special Info
Type Locality 

Glassy orange crystals with no discernable shapes. Lasalite is fairly rare and occurs at only eight localities all in the Colorado Plateau in Utah and Colorado. It was described by John Huges and others in 2008. Many of the localities were found by Joe Marty, a prolific field collector.


Lasalite

Formula
Na2Mg2(V10O28)·20H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Efflorescences 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
yellow, yellow orange 
Streak
yellow 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
Collection
William & Anne Cook Collection
Special Info
Type Locality
Mineralpedia
View Lasalite
On Dakota Matrix
Previously Sold Lasalite
On Dakota Matrix
Other Available Lasalite
WebMineral
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Mindat
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