The better the material, the more armor absorbage, parry and damage boni
wood
bone
brass
bronze
iron
coral
crystal
steel
lapis
pearl
amber
silver
ebony
quartz
gold
mithril
platinum
ruby
emerald
sapphire
Level 40+
diamond
obsidian
Level 1-10
leather
cloth
>Level 10
linnen
>Level 20
wool
>Level 30
cotton
>Level 40
silk