Grunerite

  
Grunerite with minor magnetite
Origin: Michigamme, Michigan, U.S.A.
Sample size: 3.5 x 4 x 2 cm
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

Greenish-grey silky fibrous in magnetite
Origin: Michagamme, Michigan, U.S.A.
Sample size: 3 x 5 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

  
Fibrous radial sprays of light green crystals to 8 mm in magnetite matrix.
Origin: Iron pit, Ishpeming, Michigan, United States
Ex. DeVito collection
Sample size: 4.5 x 2 x 2 cm
 
  
Origin: Michigamme, Marquette Co., Michigan, United States
Ex. Kidwell collection
Sample size: 6 x 3.5 x 4 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

Back to Alphabetical list Physical, chemical and crystallographic description Optical properties/Thin sections SEM images TEM images vibrational spectra description IR spectra Raman spectra N-IR spectra F-IR spectra IES spectra