Rheniite

  

 

  

 

  

 

  

 

  

  

 

  

 

 

  

Origin: Kudryaviy Volcanoe, Iturup Island, Kurilian Chain, Russia

Sample size: 4.7 x 3 cm (top), 4.8 x 2.9 cm (2nd row), 3.7 x 2 cm (3rd row), 5 x 3.5 cm (4th row), 7 x 5 cm (5th/6th row), 2.2 x 1.5 cm (7th row), 1.2 x 0.7 cm (8th row), 3.8 x 3 cm (bottom)

 

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Ex. DeVito Collection

  

Ex. Kidwell collection

Origin: Volcano Kudryaviy, Iturup (N) Island, Kuril Islads Chain, , Russia

Sample size: 2 x 2 x 1 cm with silvery black micro crystals to 1 mm (top), 2.5 x 2 x 1.5 cm (2nd row), 5 x 3.5 x 3.5 cm (3rd/bottom row)

 

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This locality is an andesite-basalt cone in the Medvezhia caldera (diameter 10 km), with acid dacites highly altered by very high temperature (600 to 940 C) fumaroles. The specimen shown above shows micro bright metallic blebs of "rheniite" richly scattered about the matrix. "Rheniite" is a proposed name for this rhenium sulphide. The name has not yet been approved.

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