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Seikoshi mine (Seigoushi mine), Toi-cho, Shizuoka Prefecture, Chubu Region, Honshu Island, Japan

Silver mine in altered volcanic rocks (propylitized Miocene andesite). A roadcut next to the mine was briefly famous for zeolite specimens (including yugawaralite crystals up to 3cm long), but is now completely covered with concrete to prevent erosion.





Mineral List:
  		•  Acanthite
  		• Beidellite
  		• Calcite
  		• 'Chabazite'
  		• 'Chlorite Group'
  		• 'Heulandite'
  		• Laumontite
  		• Mordenite
  		• Orthoclase
    var: Adularia
  		• Pearceite
  		• Polybasite
  		• Quartz
  		• Scolecite
  		• Stellerite
  		• 'Stilbite'
  		• Wairakite
  		• Yugawaralite


    17 entries listed. 12 valid minerals.

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