Manganocolumbite

Small brown tabular crystals of manganocolumbite in a pegmatite
Origin: Neuland Quarry, Döbschütz, Königshain, Oberlausitz, Saxony, Germany
Picture size: 4 mm
Owner: Thomas Witzke
 

Photo courtesy of: 

Thomas Witzke

Institut für Mineralogie und Lagerstättenlehre
Aachen, Germany

 

Nice intergrowths of small crystals in feldspar matrix
Origin: Olho de Gato, Governador Valadares, Minas Gerais, Brazil
Sample size: 2 x 2.5 cm matrix
 
Black 1-5 mm sized crystals in amazonite
Origin: Etyka, Siberia, Russia
Sample size: 2.5 x 2.5 cm
 
Small brown to black crystals in matrix; Analysis gives 19% Mn, 10% Fe, 3% Ti and 68% Nb
Origin: Mendig, Eifel, Germany
Sample size: thumbnail (top), thumbnail (bottom)
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

  
Origin: Elizabeth R Mine, Pala, San Diego Co., California, U.S.A.
Sample size: 4.5 x 3.5 x 1.8 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

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