Hydroxylherderite

  
Origin: Morro Redondo mine, Coronel Murta, Minas Gerais, Brazil
Sample size: 4 x 4 x 3 cm
 
  
Origin: Linopolis, Minas Gerais, Brazil
Sample size: left 2 x 1.5 cm, right 1.8 x 1 cm
 
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

Hydroxylherderite (balls) on roscherite
Origin: Tip Top mine, Custer, Custer Co., South Dakota, U.S.A.
Owner: Lou Perloff
Microscopic image
 
 
Origin: Lord Hill quarry, Stoneham, Oxford Co., Maine, U.S.A.
Owner: Lou Perloff
Microscopic image
 
Origin: Minas Gerais, Brazil
Owner: Lou Perloff
Microscopic image
 
Origin: Newry, Oxford Co., Maine, U.S.A.
Owner: Lou Perloff
Microscopic image
 

Photo courtesy of: 

Lou Perloff

Photo-Atlas of Minerals

 

  
Origin: Virgem de Lapa, Minas Gerais, Brazil
Sample size: 4 x 3.5 x 3 cm
 
  
  
Origin: Virgem da Lapa, Minas Gerais, Brazil
Sample size: 6.5 x 5.5 x 3.5 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
Origin: Corrego Frio Mine, Linopolis, Minas Gerais, Brazil
Sample size: 6.5 x 3 x 2.9 cm
 
  
A doubly terminated and twinned crystal of hydroxyl-herderite perched up on a matrix of muscovite and albite. The herderite is a lavander-grey color. When viewed from the end, the twin plane is perfectly obvious.
Origin: Xanda Mine, Virgem da Lapa, Minas Gerais, Brazil
Ex. Scott Werschky collection
Sample size: 6.3 x 4.3 x 3.5 cm
 

Photo courtesy of: 

John Veevaert, Trinity Mineral Co

Trinityminerals.com

 

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