Coconinoite

  
 
  
Light yellow crust on sandstone
  
 
  
Faint, earthy yellow crusts across sandstone matrix.
Origin: Jomas mine, White Canyon, San Juan Co., Utah, United States
Sample size: 3 x 2 x 1.5 cm (top), 7.5 x 4 x 4 cm (2nd row), 6 x 4 x 2 cm (3rd row), 7 x 6 x 2 cm (bottom)
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

Yellow fibrous tufts and yellow powdery on sandstone
Origin: Jomac Mine, White Canyon, San Juan County, Utah, U.S.A.
Sample size: 3 x 5 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

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