Bermanite

 

Origin: Fletcher mine, No. Groton, Grafton Co., New Hampshire, U.S.A.

Owner: Lou Perloff

Microscopic image

 

 

Origin: Tip Top mine, Custer, Custer Co., South Dakota, U.S.A.

Owner: Lou Perloff

Microscopic image

 

Origin: Minas Carolinas, Mangualde, Beira Alta, Portugal

Owner: Lou Perloff

Microscopic image

 

 

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Photo-Atlas of Minerals

 

  

Rockbridgeite matrix with very good bermanite, strengite and apatite.

Origin: Hagendorf Sud, Oberpfalz, Bayern, Germany

Sample size: 3 x 2 x 1 cm

 

  

Triphylite matrix with probably one of the better bermanite specimens found at this historic mine. The bermanite occurs as micro, less tan 0.1 mm, deep red crystals encompassing a large 4 x 2 cm area. Associated with the bermanite is green leucophosphite, pink hureaulite, rockbridgeite and jahnsite.

  

The bermanite stands out well as fine extremely micro crystals filling a vug with 2 mm hureaulite crystals. Bermanite is usually an obscure coating, this bermanite is fairly nice. There is also segelerite as yellow micro crystals to less than 0.5mm. Leucophosphite occurs as glassy purple micro crystals. Robertsite and rockbridgeite is also present.

Origin: Tip Top mine, Custer Co., South Dakota, United States

Sample size: 9.5 x 6 x 8 cm (top), 7 x 5 x 3 cm (bottom)

 

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Reddish brown microcrystals on matrix of altered triplite

Origin: El Gigante Mine, Punilla Department, Córdoba Province, Argentina

Sample size: 5 x 7 cm

 

Brown crystals on triplite matrix with phosphosiderite

Origin: Cantera El Crioolo, Cerro Blanco, Tanti, Cordoba, Argentina

Sample size: thumbnail

 

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Solid brownish mass of bermanite

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