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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.

Barnesite

#AH63193
Locality
Cactus Rat mine, Grand Co., Utah, United States 
Formula
Na2V5+6O16·3H2
Availability
Sold
Size
3 x 1.7 x 1.3 cm - Thumbnail 
Tagged
vanadium  

Bright rusty red minute acicualr crystals.


Barnesite

Formula
Na2V5+6O16·3H2
Crystal System
Monoclinic 
Luster
Adamantine 
Color
brown red, dark red 
Streak
brownish red 
Class
Monoclinic - Prismatic 
Hardness
Collection
Arnold G Hampson Collection
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Bayleyite

#63196
Locality
Hideout mine, White Canyon dist., San Juan Co., Utah, United States 
Formula
Mg2(UO2)(CO3)3(H2O)12·6H2
Availability
Sold
Size
4.8 x 3.5 x 1.5 cm - Miniature 
Tagged
carbonate  
Special Info
Radioactive!! 

Bright yellow masses of Bayleyite composed of tightly packed acicular crystals.


Bayleyite

Formula
Mg2(UO2)(CO3)3(H2O)12·6H2
Crystal System
Monoclinic 
Cleavage
None, None, None 
Luster
Vitreous - Dull 
Color
yellow, pale yellow, yellowish white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
Special Info
Radioactive!!
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Becquerelite - AH54474
Becquerelite - AH54474

Becquerelite

#AH54474
Locality
Happy Jack mine, White Canyon, San Juan Co., Utah, United States 
Formula
Ca(UO2)6O4(OH)6·8H2
Availability
Sold
Size
2.3 x 1.3 x 0.3 cm - Thumbnail 

Small piece with glassy yellow crystals. This may be Schoepite.


Becquerelite

Formula
Ca(UO2)6O4(OH)6·8H2
Crystal System
Orthorhombic 
Crystal Habit
Crystalline - Fine 
Cleavage
Perfect, Perfect, None 
Luster
Resinous 
Color
brownish yellow, golden yellow, orange, lemon 
Streak
yellow 
Class
Orthorhombic - Pyramidal 
Hardness
2.5 
Collection
Arnold G Hampson Collection

Carnotite

on petrified wood - #BAC63186
Locality
Dissappointment Creek, San Miguel Co., Colorado, United States 
Formula
K2(UO2)2(VO4)2·3H2
Availability
Available
Price
$25.00
Size
3.5 x 3 x 1 cm - Miniature 
Tagged
vanadium  
Special Info
Radioactive!! 

Bright yellow pulverulent Carnotite on and in petrified wood. 


Carnotite

Formula
K2(UO2)2(VO4)2·3H2
Crystal System
Monoclinic 
Crystal Habit
Earthy, Encrustations, Platy 
Cleavage
Perfect, None, None 
Luster
Pearly 
Color
yellow, golden yellow, greenish yellow 
Streak
light yellow 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
Collection
William & Anne Cook Collection
Special Info
Radioactive!!

Coconinoite

#AH63211
Locality
Jomac mine, San Juan Co., Utah, United States 
Formula
Fe3+2Al2(UO2)2(PO4)4(SO4)(OH)2·20H2
Availability
Sold
Size
5 x 3 x 1.5 cm - Miniature 

Light yellow, pulverulent masses on sandstone.


Coconinoite

Formula
Fe3+2Al2(UO2)2(PO4)4(SO4)(OH)2·20H2
Crystal System
Monoclinic 
Crystal Habit
Microscopic Crystals, Platy, Lath 
Color
yellow, cream yellow, light yellow 
Streak
white 
Class
Monoclinic 
Hardness
1-2 
Collection
Arnold G Hampson Collection

Doloresite

#BW63200
Locality
Monument #2 mine, Apache Co., Arizona, United States 
Formula
V4+3O4(OH)4 
Availability
Sold
Size
4 x 3 x 2.3 cm - Miniature 
Tagged
vanadium  

Brown crusts and impregnations with yellow Steigerite or Tyuyamunite.


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
Bill Wilson Collection

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