Materials for armor in Fantasy game

[kdarc]

So I have worked out some ideas for Magic Resistance-granting armor. Basically, I want it to be a MR-granted version of Meteoric equipment from DF1 and what I'm fiddling with is this:

The armor grants magic resistance based on the total amount of the weight of armor made from the material is worn. So, for instance, wearing 0-20 lb. might give 1 MR, 21-30 might give 2, etc.

I want to the material (let's call it... Magresitrum until now) to be fairly heavy and reasonable priced. I'd love if some of the more experienced forumites could help me out with the specifics, on weight and price, as well as the amount of MR granted. The material is supposed to be rare and not commonly available (the large Empire controlling most of the setting world has more or less taken over all the mines), so that would probably be reflected in the price as well.

One side effect I am considering is the effect on weapons from the same material. I like the idea of "mage-bane" weapons, ala Meteoric from DF, but I'm not sure the weapons should grant MR. Any ideas?

Forgive my ignorance about the subject, I am still a relative newbie in regards to customizing equipment and such.