Potarite

Two of the grains of have minor associated native gold
Origin: Potaro River Region, Guyana
Ex. Mark Feinglos collection
Sample size: 1 mm grains
 

Photo courtesy of: 

John Veevaert, Trinity Mineral Co

Trinityminerals.com

 

  
Origin: Itabira, Minas Gerais, Brazil
Ex. Kidwell collection
Sample size: 0.75 mm grain in capsule
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

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