Ha, got you! This is nothing about magic - or is the properties of these materials magical in themselves? Bascially, the crafting system got me thinking about what things are made out of.
Currently we have:
1) glass 2) iron 3) gold
4) silver 5) copper 6) zinc
7) cromium
tungsten 9) carbon
10) coal 11) basalt 12) silica
13) diamond 14) plastic 15) tin
16) leather 17) hair 18) wool
19) wood 20) magic-wood
with 0 being "base material".
But if we go in depth with the crafting system, why not go indepth with some materials things can be made out of - and perhaps get benefits for being made out of it. For example, what if someone found a mine of mithril (is that really a material you can mine? I assume it is as you can make armour out of it - dang it, she's got me spelling armor with a u now) way off in never-never land. why wouldn't they be able to forge it into armor (or have someone forge it for them). Below are some ideas (ripped off a D&D wiki website) with the basic benefits (if you're talking D&D) to having the item made out of said material. Note, some things can not be made out of some of these materials - ie: a wooden staff can not be made out of Adamantine as that is a metal, but it can be made out of darkwood. Note 2, some of these I've not even heard of as they were scavaged from various sources - not that I don't have the sources, I just haven't paid enough attention to them.
Adamantine - DR, improved sundering
Darkwood - ½ normal weight of wood
Dragonhide - can make metal armors that count as hide
Cold Iron - 2x heavy has bane to magical creatures
Mithral - Makes armors that weigh ½ as much, and count as a lighter type
Alchemical Silver - maintains weapon, and bane to lycanthropes
Pandemonic Silver - causes scream that makes others cower in strong winds
Thinaun - traps soul of those slain by it
Baatorian Steel - +1 to damage on slashing and piercing
Baatorian Greensteel - Counts as Wounding if magically enchanted
Morghuth Iron - -1 attack, but poisons opponent
Truesteel - +1 on roll to confirm critical hits
Dendritic - armor made of growing crystal
Astral Driftmetal - 25% chance of working against incorporeal creatures
Blended Quartz - -20% arcane failure rate
Bronzewood - wood that can be made into plate armor and weighs 10% less
Chitin - plate armor made from insect exoskeletons
Darkleaf - special worked Darkwood made into light plate armor
Elukian Clay - removes weight penalty for swim checks
Entropium - +2 max dex -10% arcane failure, +2 AC penalty and added weight.
Urdukar - +2 DC on scry attempts per 5 lbs carried
Aururum - Pieces meld back together if broken
Frystalline - Good aligned
Serren - Branch wood that has ghost touch
Green Starmetal - Adamantine that deals 1d6 extra damage to outsiders.
Blue Ice - +1 damage slashing weapons, Mythrial type armor but cold as ice
Rimfire Ice - Glows like torch, +1 cold damage, explodes 1d6 cold damage
Stygian Ice - deals wisdom than consitution damage
Pearl Steel - functions better underwater than normal weapons
Riverine - ½ AC becomes deflection bonus, provides force affect
Abyssal Bloodiron - Cold Iron, +4 Critical Confirm
Just ideas and thoughts to keep the brain working.
Kvetch