Manganotantalite

     

 

  

 

  

 

  

Origin: Alto de Furnas mine, Equador, Rio Grande do Norte, Brazil

Sample size: top 2 x 2 x 1.5 cm, 2nd row 1.5 x 1.5 x 1.5 cm, 3rd row 2.5 x 2 x 2 cm, bottom 4 x 2.5 x 1.3 cm

 

    

Several black platy crystals to 5 mm in albite matrix

Origin: Morefield mine, Amelia, Virginia, United States

Sample size: 6 x 4 x 4 cm

 

Photo courtesy of: 

Origin: Alto do Giz pegmatite, Equador, Seridó Oriental, Rio Grande do Norte, Northeast Region, Brazil

Sample size: 8.5 cm

Owner: Thomas Witzke

 

Photo courtesy of: 

Institut für Mineralogie und Lagerstättenlehre
Aachen, Germany

 

  

Origin: Equador, Rio Grande do Norte, Brazil

Sample size: 2.9 x 2.5 x 2.1 cm

 

  

  

Twin

Origin: Lavra de Cori, Bahia, Brazil

Sample size: 7.0 x 4.5 x 4.3 cm

 

  

  

Origin: Alto do Giz, Equador, Rio Grande do Norte, Brazil

Sample size: 4.3 x 3.4 x 2.3 cm

 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

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