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industrial minerals design type

  • ET004.07.jpg
  • ET005.07.jpg
  • ET006.07.jpg
  • ET007.07.jpg
Short desc: industrial minerals




Used by 4 stamps: (See all uses as list)

Ethiopia 12/25/2007 0.40b d=gypsum (2007) perf=14
Ethiopia 12/25/2007 0.60b d=quartz (2007) perf=14
Ethiopia 12/25/2007 1.00b d=Ambo Sandstone perf=14
Ethiopia 12/25/2007 2.00b d=feldspar (2007) perf=14




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