anchor.diff:  	item_state = "tile-plasma"
   	turf_type = /turf/open/floor/mineral/plasma
   	mineralType = "plasma"
  -	materials = list(/datum/material/plasma=500)
  +	materials = list(MAT_PLASMA=500)
   
   /obj/item/stack/tile/mineral/uranium
   	name = "uranium tile"
  
positive.code: 	item_state = "tile-uranium"
  	turf_type = /turf/open/floor/mineral/uranium
  	mineralType = "uranium"
  	materials = list(/datum/material/uranium=500)
  
  /obj/item/stack/tile/mineral/gold
  	name = "gold tile"
  
negative.code: 	item_state = "tile-gold"
  	turf_type = /turf/open/floor/mineral/gold
  	mineralType = "gold"
  	materials = list(MAT_GOLD=500)
  
  /obj/item/stack/tile/mineral/silver
  	name = "silver tile"
  