Fransoletite

 

Fransoletite with roscherite and tiptopite

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

Owner: Lou Perloff

Microscopic image

 

Photo courtesy of: 

Photo-Atlas of Minerals

  

Extremely rare beryllophosphate with exceptional and very distinct crystals of fransoletite to 1mm associated with nice sprays of tiptopite to 1mm, red tufts of montgomeryite, black robertsite and white bladed fairfieldite.

  
At least two "turbid" white micro crystals of this very rare, and locality mineral, fransoletite to .075mm. There is also aboundant tiptopite sprays along with red montgomeryite and flaky white fairfieldite.

Origin: Tip Top mine, Custer Co., South Dakota, United States (type locality)

Ex. Grenier collection

Sample size: 5 x 3 x 2 cm (top), 5 x 3 x 1.5 cm (bottom)

 

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