Goethite

  

This is a wonderful pseudomorph specimen, with goethite having replaced three distinct and isolated pyrite crystals, perfectly preserving their sharp form, on a bed of amethyst! The amethyst rests on a crust of etched green fluorite, typical of this famous old deposit.

Origin: Unaweep Canyon, Colorado, U.S.A.

Sample size: 7.2 x 4.5 x 1.4 cm

 

  

Goethite pseudomorph after siderite

Origin: Pikes Peak Pluton Area, Park County, Colorado

Sample size: 7 x 6 x 4 cm

 

     

Origin: Nandan,Guangxi Province, China

Sample size: 13.5 x 4.7 x 3.9 cm

 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

Photo courtesy of: