"MaterialID","Actual material","Simplified material"
1,"Amber","Amber"
2,"Antler","Bone"
3,"Antler (?)","Bone"
4,"Bone","Bone"
5,"Coal","Jet/shale"
6,"Copper alloy","Copper alloy"
7,"Fired clay","Fired clay"
8,"Frit","Frit"
9,"Gem","Gem"
10,"Glass","Glass"
11,"Gold","Gold"
12,"Iron","Iron"
13,"Jet","Jet/shale"
14,"Lead","Lead alloy"
15,"Lignite","Jet/shale"
16,"Shale","Jet/shale"
17,"Silver","Silver"
18,"stone","Stone"