Digging materials
Digging materials are found in 30 zones. Most of their uses are at the Crafting table.
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Ash Found in Volcano, The Wheel of Souls +1 
+1 53
Clay Found in Beach, Lake +4 
+1 56
Cursed Soil Found in Capital, The Lair +2 
+1 54 Dirt Found in Capital, Factory +16 
+13 1718
Fertile Soil Found in Farm, Forest +5 
17
Gravel Found in Mine, Volcano +7 
49
Sand Found in Beach, Desert +7 
+2 69
Snow Found in Tundra, The Hall of Mirrors 
42